diff --git a/wp-admin/categories.php b/wp-admin/categories.php
index 6bc72aea48..904e736a13 100644
--- a/wp-admin/categories.php
+++ b/wp-admin/categories.php
@@ -142,7 +142,7 @@ endif; ?>
 
 <form class="search-form topmargin" action="" method="get">
 <p class="search-box">
-	<label class="hidden" for="category-search-input"><?php _e('Search Categories'); ?>:</label>
+	<label class="invisible" for="category-search-input"><?php _e('Search Categories'); ?>:</label>
 	<input type="text" id="category-search-input" name="s" value="<?php _admin_search_query(); ?>" />
 	<input type="submit" value="<?php _ea( 'Search Categories' ); ?>" class="button" />
 </p>
diff --git a/wp-admin/css/global.css b/wp-admin/css/global.css
index 05b82b9f3b..3c8afd4da5 100644
--- a/wp-admin/css/global.css
+++ b/wp-admin/css/global.css
@@ -186,11 +186,12 @@ table {
 }
 
 /* Hide visually but not from screen readers */
-.hidden {
+.invisible {
 	position: absolute;
 	left: -1000em;
 }
 
+.hidden,
 .js .closed .inside,
 .js .hide-if-js,
 .no-js .hide-if-no-js {
diff --git a/wp-admin/edit-comments.php b/wp-admin/edit-comments.php
index 64cb81b529..21dd065d1c 100644
--- a/wp-admin/edit-comments.php
+++ b/wp-admin/edit-comments.php
@@ -180,7 +180,7 @@ unset($status_links);
 </ul>
 
 <p class="search-box">
-	<label class="hidden" for="comment-search-input"><?php _e( 'Search Comments' ); ?>:</label>
+	<label class="invisible" for="comment-search-input"><?php _e( 'Search Comments' ); ?>:</label>
 	<input type="text" id="comment-search-input" name="s" value="<?php _admin_search_query(); ?>" />
 	<input type="submit" value="<?php _ea( 'Search Comments' ); ?>" class="button" />
 </p>
diff --git a/wp-admin/edit-form-advanced.php b/wp-admin/edit-form-advanced.php
index a15f50a846..6873844079 100644
--- a/wp-admin/edit-form-advanced.php
+++ b/wp-admin/edit-form-advanced.php
@@ -280,7 +280,7 @@ function post_tags_meta_box($post, $box) {
 	<textarea name="<?php echo "tax_input[$tax_name]"; ?>" class="the-tags" id="tax-input[<?php echo $tax_name; ?>]"><?php echo attr(get_terms_to_edit( $post->ID, $tax_name )); ?></textarea></div>
 
 	<span class="ajaxtag hide-if-no-js">
-		<label class="hidden" for="new-tag-<?php echo $tax_name; ?>"><?php echo $box['title']; ?></label>
+		<label class="invisible" for="new-tag-<?php echo $tax_name; ?>"><?php echo $box['title']; ?></label>
 		<input type="text" id="new-tag-<?php echo $tax_name; ?>" name="newtag[<?php echo $tax_name; ?>]" class="newtag form-input-tip" size="16" autocomplete="off" value="<?php _ea('Add new tag'); ?>" />
 		<input type="button" class="button tagadd" value="<?php _ea('Add'); ?>" tabindex="3" />
 	</span></div>
@@ -331,8 +331,8 @@ function post_categories_meta_box($post) {
 <div id="category-adder" class="wp-hidden-children">
 	<h4><a id="category-add-toggle" href="#category-add" class="hide-if-no-js" tabindex="3"><?php _e( '+ Add New Category' ); ?></a></h4>
 	<p id="category-add" class="wp-hidden-child">
-		<label class="hidden" for="newcat"><?php _e( 'Add New Category' ); ?></label><input type="text" name="newcat" id="newcat" class="form-required form-input-tip" value="<?php _ea( 'New category name' ); ?>" tabindex="3" aria-required="true"/>
-		<label class="hidden" for="newcat_parent"><?php _e('Parent category'); ?>:</label><?php wp_dropdown_categories( array( 'hide_empty' => 0, 'name' => 'newcat_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => __('Parent category'), 'tab_index' => 3 ) ); ?>
+		<label class="invisible" for="newcat"><?php _e( 'Add New Category' ); ?></label><input type="text" name="newcat" id="newcat" class="form-required form-input-tip" value="<?php _ea( 'New category name' ); ?>" tabindex="3" aria-required="true"/>
+		<label class="invisible" for="newcat_parent"><?php _e('Parent category'); ?>:</label><?php wp_dropdown_categories( array( 'hide_empty' => 0, 'name' => 'newcat_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => __('Parent category'), 'tab_index' => 3 ) ); ?>
 		<input type="button" id="category-add-sumbit" class="add:categorychecklist:category-add button" value="<?php _ea( 'Add' ); ?>" tabindex="3" />
 		<?php wp_nonce_field( 'add-category', '_ajax_nonce', false ); ?>
 		<span id="category-ajax-response"></span>
@@ -357,7 +357,7 @@ function post_password_meta_box($post) {
 	<label for="post_status_private" class="selectit"><input id="post_status_private" name="post_status" type="checkbox" value="private" <?php checked($post->post_status, 'private'); ?> tabindex="4" /> <?php _e('Keep this post private') ?></label>
 </p>
 <h4><?php _e( 'Post Password' ); ?></h4>
-<p><label class="hidden" for="post_password"><?php _e('Password Protect This Post') ?></label><input name="post_password" type="text" size="25" id="post_password" value="<?php the_post_password(); ?>" /></p>
+<p><label class="invisible" for="post_password"><?php _e('Password Protect This Post') ?></label><input name="post_password" type="text" size="25" id="post_password" value="<?php the_post_password(); ?>" /></p>
 <p><?php _e('Setting a password will require people who visit your blog to enter the above password to view this post and its comments.'); ?></p>
 <?php
 }
@@ -372,7 +372,7 @@ function post_password_meta_box($post) {
  */
 function post_excerpt_meta_box($post) {
 ?>
-<label class="hidden" for="excerpt"><?php _e('Excerpt') ?></label><textarea rows="1" cols="40" name="excerpt" tabindex="6" id="excerpt"><?php echo $post->post_excerpt ?></textarea>
+<label class="invisible" for="excerpt"><?php _e('Excerpt') ?></label><textarea rows="1" cols="40" name="excerpt" tabindex="6" id="excerpt"><?php echo $post->post_excerpt ?></textarea>
 <p><?php _e('Excerpts are optional hand-crafted summaries of your content. You can <a href="http://codex.wordpress.org/Template_Tags/the_excerpt" target="_blank">use them in your template</a>'); ?></p>
 <?php
 }
@@ -499,7 +499,7 @@ if ( 'publish' == $post->post_status || 'private' == $post->post_status )
  */
 function post_slug_meta_box($post) {
 ?>
-<label class="hidden" for="post_name"><?php _e('Post Slug') ?></label><input name="post_name" type="text" size="13" id="post_name" value="<?php echo attr( $post->post_name ); ?>" />
+<label class="invisible" for="post_name"><?php _e('Post Slug') ?></label><input name="post_name" type="text" size="13" id="post_name" value="<?php echo attr( $post->post_name ); ?>" />
 <?php
 }
 if ( !( 'pending' == $post->post_status && !current_user_can( 'publish_posts' ) ) )
@@ -522,7 +522,7 @@ function post_author_meta_box($post) {
 	if ( $post->post_author && !in_array($post->post_author, $authors) )
 		$authors[] = $post->post_author;
 ?>
-<label class="hidden" for="post_author_override"><?php _e('Post Author'); ?></label><?php wp_dropdown_users( array('include' => $authors, 'name' => 'post_author_override', 'selected' => empty($post->ID) ? $user_ID : $post->post_author) ); ?>
+<label class="invisible" for="post_author_override"><?php _e('Post Author'); ?></label><?php wp_dropdown_users( array('include' => $authors, 'name' => 'post_author_override', 'selected' => empty($post->ID) ? $user_ID : $post->post_author) ); ?>
 <?php
 }
 add_meta_box('authordiv', __('Post Author'), 'post_author_meta_box', 'post', 'normal', 'core');
@@ -597,7 +597,7 @@ else
 <div id="post-body-content">
 <div id="titlediv">
 <div id="titlewrap">
-	<label class="hidden" for="title"><?php _e('Title') ?></label>
+	<label class="invisible" for="title"><?php _e('Title') ?></label>
 	<input type="text" name="post_title" size="30" tabindex="1" value="<?php echo attr( htmlspecialchars( $post->post_title ) ); ?>" id="title" autocomplete="off" />
 </div>
 <div class="inside">
diff --git a/wp-admin/edit-link-categories.php b/wp-admin/edit-link-categories.php
index eb1fc1ec21..82c09a105a 100644
--- a/wp-admin/edit-link-categories.php
+++ b/wp-admin/edit-link-categories.php
@@ -73,7 +73,7 @@ endif; ?>
 
 <form class="search-form" action="" method="get">
 <p class="search-box">
-	<label class="hidden" for="link-category-search-input"><?php _e( 'Search Categories' ); ?>:</label>
+	<label class="invisible" for="link-category-search-input"><?php _e( 'Search Categories' ); ?>:</label>
 	<input type="text" id="link-category-search-input" name="s" value="<?php _admin_search_query(); ?>" />
 	<input type="submit" value="<?php _ea( 'Search Categories' ); ?>" class="button" />
 </p>
diff --git a/wp-admin/edit-link-form.php b/wp-admin/edit-link-form.php
index 52ddccc0bd..4cb903c7c4 100644
--- a/wp-admin/edit-link-form.php
+++ b/wp-admin/edit-link-form.php
@@ -138,7 +138,7 @@ function link_categories_meta_box($link) { ?>
 <div id="category-adder" class="wp-hidden-children">
 	<h4><a id="category-add-toggle" href="#category-add"><?php _e( '+ Add New Category' ); ?></a></h4>
 	<p id="link-category-add" class="wp-hidden-child">
-		<label class="hidden" for="newcat"><?php _e( '+ Add New Category' ); ?></label>
+		<label class="invisible" for="newcat"><?php _e( '+ Add New Category' ); ?></label>
 		<input type="text" name="newcat" id="newcat" class="form-required form-input-tip" value="<?php _ea( 'New category name' ); ?>" aria-required="true" />
 		<input type="button" id="category-add-submit" class="add:categorychecklist:linkcategorydiv button" value="<?php _ea( 'Add' ); ?>" />
 		<?php wp_nonce_field( 'add-link-category', '_ajax_nonce', false ); ?>
@@ -157,7 +157,7 @@ add_meta_box('linkcategorydiv', __('Categories'), 'link_categories_meta_box', 'l
  * @param object $link
  */
 function link_target_meta_box($link) { ?>
-<fieldset><legend class="hidden"><?php _e('Target') ?></legend>
+<fieldset><legend class="invisible"><?php _e('Target') ?></legend>
 <p><label for="link_target_blank" class="selectit">
 <input id="link_target_blank" type="radio" name="link_target" value="_blank" <?php echo ( isset( $link->link_target ) && ($link->link_target == '_blank') ? 'checked="checked"' : ''); ?> />
 <?php _e('<code>_blank</code> - new window or tab.'); ?></label></p>
@@ -192,7 +192,7 @@ function link_xfn_meta_box($link) {
 			<table cellpadding="3" cellspacing="5" class="form-table">
 				<tr>
 					<th scope="row"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('identity') ?> </th>
-					<td><fieldset><legend class="hidden"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('identity') ?> </legend>
+					<td><fieldset><legend class="invisible"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('identity') ?> </legend>
 						<label for="me">
 						<input type="checkbox" name="identity" value="me" id="me" <?php xfn_check('identity', 'me'); ?> />
 						<?php _e('another web address of mine') ?></label>
@@ -200,7 +200,7 @@ function link_xfn_meta_box($link) {
 				</tr>
 				<tr>
 					<th scope="row"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('friendship') ?> </th>
-					<td><fieldset><legend class="hidden"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('friendship') ?> </legend>
+					<td><fieldset><legend class="invisible"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('friendship') ?> </legend>
 						<label for="contact">
 						<input class="valinp" type="radio" name="friendship" value="contact" id="contact" <?php xfn_check('friendship', 'contact', 'radio'); ?> /> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('contact') ?></label>
 						<label for="acquaintance">
@@ -213,7 +213,7 @@ function link_xfn_meta_box($link) {
 				</tr>
 				<tr>
 					<th scope="row"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('physical') ?> </th>
-					<td><fieldset><legend class="hidden"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('physical') ?> </legend>
+					<td><fieldset><legend class="invisible"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('physical') ?> </legend>
 						<label for="met">
 						<input class="valinp" type="checkbox" name="physical" value="met" id="met" <?php xfn_check('physical', 'met'); ?> />
 						<?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('met') ?></label>
@@ -221,7 +221,7 @@ function link_xfn_meta_box($link) {
 				</tr>
 				<tr>
 					<th scope="row"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('professional') ?> </th>
-					<td><fieldset><legend class="hidden"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('professional') ?> </legend>
+					<td><fieldset><legend class="invisible"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('professional') ?> </legend>
 						<label for="co-worker">
 						<input class="valinp" type="checkbox" name="professional" value="co-worker" id="co-worker" <?php xfn_check('professional', 'co-worker'); ?> />
 						<?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('co-worker') ?></label>
@@ -232,7 +232,7 @@ function link_xfn_meta_box($link) {
 				</tr>
 				<tr>
 					<th scope="row"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('geographical') ?> </th>
-					<td><fieldset><legend class="hidden"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('geographical') ?> </legend>
+					<td><fieldset><legend class="invisible"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('geographical') ?> </legend>
 						<label for="co-resident">
 						<input class="valinp" type="radio" name="geographical" value="co-resident" id="co-resident" <?php xfn_check('geographical', 'co-resident', 'radio'); ?> />
 						<?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('co-resident') ?></label>
@@ -246,7 +246,7 @@ function link_xfn_meta_box($link) {
 				</tr>
 				<tr>
 					<th scope="row"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('family') ?> </th>
-					<td><fieldset><legend class="hidden"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('family') ?> </legend>
+					<td><fieldset><legend class="invisible"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('family') ?> </legend>
 						<label for="child">
 						<input class="valinp" type="radio" name="family" value="child" id="child" <?php xfn_check('family', 'child', 'radio'); ?>  />
 						<?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('child') ?></label>
@@ -269,7 +269,7 @@ function link_xfn_meta_box($link) {
 				</tr>
 				<tr>
 					<th scope="row"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('romantic') ?> </th>
-					<td><fieldset><legend class="hidden"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('romantic') ?> </legend>
+					<td><fieldset><legend class="invisible"> <?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('romantic') ?> </legend>
 						<label for="muse">
 						<input class="valinp" type="checkbox" name="romantic" value="muse" id="muse" <?php xfn_check('romantic', 'muse'); ?> />
 						<?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('muse') ?></label>
diff --git a/wp-admin/edit-page-form.php b/wp-admin/edit-page-form.php
index 52946e6074..728fb5add6 100644
--- a/wp-admin/edit-page-form.php
+++ b/wp-admin/edit-page-form.php
@@ -260,7 +260,7 @@ function page_password_meta_box($post){
 ?>
 <p><label for="post_status_private" class="selectit"><input id="post_status_private" name="post_status" type="checkbox" value="private" <?php checked($post->post_status, 'private'); ?> tabindex='4' /> <?php _e('Keep this page private') ?></label></p>
 <h4><?php _e( 'Page Password' ); ?></h4>
-<p><label class="hidden" for="post_password"><?php _e('Password Protect This Page') ?></label><input name="post_password" type="text" size="25" id="post_password" value="<?php the_post_password(); ?>" /></p>
+<p><label class="invisible" for="post_password"><?php _e('Password Protect This Page') ?></label><input name="post_password" type="text" size="25" id="post_password" value="<?php the_post_password(); ?>" /></p>
 <p><?php _e('Setting a password will require people who visit your blog to enter the above password to view this page and its comments.'); ?></p>
 <?php
 }
@@ -276,14 +276,14 @@ function page_password_meta_box($post){
 function page_attributes_meta_box($post){
 ?>
 <h5><?php _e('Parent') ?></h5>
-<label class="hidden" for="parent_id"><?php _e('Page Parent') ?></label>
+<label class="invisible" for="parent_id"><?php _e('Page Parent') ?></label>
 <?php wp_dropdown_pages(array('exclude_tree' => $post->ID, 'selected' => $post->post_parent, 'name' => 'parent_id', 'show_option_none' => __('Main Page (no parent)'), 'sort_column'=> 'menu_order, post_title')); ?>
 <p><?php _e('You can arrange your pages in hierarchies, for example you could have an &#8220;About&#8221; page that has &#8220;Life Story&#8221; and &#8220;My Dog&#8221; pages under it. There are no limits to how deeply nested you can make pages.'); ?></p>
 <?php
 	if ( 0 != count( get_page_templates() ) ) {
 ?>
 <h5><?php _e('Template') ?></h5>
-<label class="hidden" for="page_template"><?php _e('Page Template') ?></label><select name="page_template" id="page_template">
+<label class="invisible" for="page_template"><?php _e('Page Template') ?></label><select name="page_template" id="page_template">
 <option value='default'><?php _e('Default Template'); ?></option>
 <?php page_template_dropdown($post->page_template); ?>
 </select>
@@ -292,7 +292,7 @@ function page_attributes_meta_box($post){
 	}
 ?>
 <h5><?php _e('Order') ?></h5>
-<p><label class="hidden" for="menu_order"><?php _e('Page Order') ?></label><input name="menu_order" type="text" size="4" id="menu_order" value="<?php echo attr($post->menu_order) ?>" /></p>
+<p><label class="invisible" for="menu_order"><?php _e('Page Order') ?></label><input name="menu_order" type="text" size="4" id="menu_order" value="<?php echo attr($post->menu_order) ?>" /></p>
 <p><?php _e('Pages are usually ordered alphabetically, but you can put a number above to change the order pages appear in. (We know this is a little janky, it&#8217;ll be better in future releases.)'); ?></p>
 <?php
 }
@@ -348,7 +348,7 @@ add_meta_box('pagecommentstatusdiv', __('Discussion'), 'page_comments_status_met
  */
 function page_slug_meta_box($post){
 ?>
-<label class="hidden" for="post_name"><?php _e('Page Slug') ?></label><input name="post_name" type="text" size="13" id="post_name" value="<?php echo attr( $post->post_name ); ?>" />
+<label class="invisible" for="post_name"><?php _e('Page Slug') ?></label><input name="post_name" type="text" size="13" id="post_name" value="<?php echo attr( $post->post_name ); ?>" />
 <?php
 }
 add_meta_box('pageslugdiv', __('Page Slug'), 'page_slug_meta_box', 'page', 'normal', 'core');
@@ -370,7 +370,7 @@ if ( $authors && count( $authors ) > 1 ) {
 		if ( $post->post_author && !in_array($post->post_author, $authors) )
 			$authors[] = $post->post_author;
 ?>
-<label class="hidden" for="post_author_override"><?php _e('Page Author'); ?></label><?php wp_dropdown_users( array('include' => $authors, 'name' => 'post_author_override', 'selected' => empty($post->ID) ? $user_ID : $post->post_author) ); ?>
+<label class="invisible" for="post_author_override"><?php _e('Page Author'); ?></label><?php wp_dropdown_users( array('include' => $authors, 'name' => 'post_author_override', 'selected' => empty($post->ID) ? $user_ID : $post->post_author) ); ?>
 <?php
 	}
 	add_meta_box('pageauthordiv', __('Page Author'), 'page_author_meta_box', 'page', 'normal', 'core');
@@ -441,7 +441,7 @@ $side_meta_boxes = do_meta_boxes('page', 'side', $post);
 <div id="post-body-content">
 <div id="titlediv">
 <div id="titlewrap">
-	<label class="hidden" for="title"><?php _e('Title') ?></label>
+	<label class="invisible" for="title"><?php _e('Title') ?></label>
 	<input type="text" name="post_title" size="30" tabindex="1" value="<?php echo attr( htmlspecialchars( $post->post_title ) ); ?>" id="title" autocomplete="off" />
 </div>
 <div class="inside">
diff --git a/wp-admin/edit-pages.php b/wp-admin/edit-pages.php
index 3408d8a4bd..bcf9372cf0 100644
--- a/wp-admin/edit-pages.php
+++ b/wp-admin/edit-pages.php
@@ -169,7 +169,7 @@ endif;
 </ul>
 
 <p class="search-box">
-	<label class="hidden" for="page-search-input"><?php _e( 'Search Pages' ); ?>:</label>
+	<label class="invisible" for="page-search-input"><?php _e( 'Search Pages' ); ?>:</label>
 	<input type="text" id="page-search-input" name="s" value="<?php _admin_search_query(); ?>" />
 	<input type="submit" value="<?php _ea( 'Search Pages' ); ?>" class="button" />
 </p>
diff --git a/wp-admin/edit-tags.php b/wp-admin/edit-tags.php
index 5d52de1f2c..e71c3b9297 100644
--- a/wp-admin/edit-tags.php
+++ b/wp-admin/edit-tags.php
@@ -158,7 +158,7 @@ endif; ?>
 
 <form class="search-form" action="" method="get">
 <p class="search-box">
-	<label class="hidden" for="tag-search-input"><?php _e( 'Search Tags' ); ?>:</label>
+	<label class="invisible" for="tag-search-input"><?php _e( 'Search Tags' ); ?>:</label>
 	<input type="text" id="tag-search-input" name="s" value="<?php _admin_search_query(); ?>" />
 	<input type="submit" value="<?php _ea( 'Search Tags' ); ?>" class="button" />
 </p>
diff --git a/wp-admin/edit.php b/wp-admin/edit.php
index fa5a84994d..6ada6de941 100644
--- a/wp-admin/edit.php
+++ b/wp-admin/edit.php
@@ -164,7 +164,7 @@ endif;
 </ul>
 
 <p class="search-box">
-	<label class="hidden" for="post-search-input"><?php _e( 'Search Posts' ); ?>:</label>
+	<label class="invisible" for="post-search-input"><?php _e( 'Search Posts' ); ?>:</label>
 	<input type="text" id="post-search-input" name="s" value="<?php the_search_query(); ?>" />
 	<input type="submit" value="<?php _ea( 'Search Posts' ); ?>" class="button" />
 </p>
diff --git a/wp-admin/includes/file.php b/wp-admin/includes/file.php
index f00ce38b23..578b780b21 100644
--- a/wp-admin/includes/file.php
+++ b/wp-admin/includes/file.php
@@ -757,7 +757,7 @@ jQuery(function($){
 <tr valign="top">
 <th scope="row"><?php _e('Connection Type') ?></th>
 <td>
-<fieldset><legend class="hidden"><?php _e('Connection Type') ?></legend>
+<fieldset><legend class="invisible"><?php _e('Connection Type') ?></legend>
 <label><input id="ftp" name="connection_type"  type="radio" value="ftp" <?php checked('ftp', $connection_type); if ( defined('FTP_SSL') || defined('FTP_SSH') ) echo ' disabled="disabled"'; ?>/> <?php _e('FTP') ?></label><br />
 <label><input id="ftps" name="connection_type" type="radio" value="ftps" <?php checked('ftps', $connection_type); if ( defined('FTP_SSH') || defined('FTP_SSH') ) echo ' disabled="disabled"';  ?>/> <?php _e('FTPS (SSL)') ?></label><br />
 <?php if ( extension_loaded('ssh2') ) { ?><label><input id="ssh" name="connection_type" type="radio" value="ssh" <?php checked('ssh', $connection_type);  if ( defined('FTP_SSL') || defined('FTP_SSH') ) echo ' disabled="disabled"'; ?>/> <?php _e('SSH') ?></label><?php } ?>
diff --git a/wp-admin/includes/media.php b/wp-admin/includes/media.php
index b4ceb9243b..0a900d8db7 100644
--- a/wp-admin/includes/media.php
+++ b/wp-admin/includes/media.php
@@ -1350,7 +1350,7 @@ SWFUpload.onload = function() {
 <div id="html-upload-ui">
 <?php do_action('pre-html-upload-ui'); ?>
 	<p id="async-upload-wrap">
-	<label class="hidden" for="async-upload"><?php _e('Upload'); ?></label>
+	<label class="invisible" for="async-upload"><?php _e('Upload'); ?></label>
 	<input type="file" name="async-upload" id="async-upload" /> <input type="submit" class="button" name="html-upload" value="<?php _ea('Upload'); ?>" /> <a href="#" onclick="return top.tb_remove();"><?php _e('Cancel'); ?></a>
 	</p>
 	<div class="clear"></div>
@@ -1706,7 +1706,7 @@ function media_upload_library_form($errors) {
 <input type="hidden" name="post_mime_type" value="<?php echo isset( $_GET['post_mime_type'] ) ? attr( $_GET['post_mime_type'] ) : ''; ?>" />
 
 <p id="media-search" class="search-box">
-	<label class="hidden" for="media-search-input"><?php _e('Search Media');?>:</label>
+	<label class="invisible" for="media-search-input"><?php _e('Search Media');?>:</label>
 	<input type="text" id="media-search-input" name="s" value="<?php the_search_query(); ?>" />
 	<input type="submit" value="<?php _ea( 'Search Media' ); ?>" class="button" />
 </p>
diff --git a/wp-admin/includes/plugin-install.php b/wp-admin/includes/plugin-install.php
index e902dcf82d..bfd757c74e 100644
--- a/wp-admin/includes/plugin-install.php
+++ b/wp-admin/includes/plugin-install.php
@@ -163,7 +163,7 @@ function install_search_form(){
 			<option value="tag"<?php selected('tag', $type) ?>><?php _x('Tag', 'Plugin Installer') ?></option>
 		</select>
 		<input type="text" name="s" value="<?php echo attr($term) ?>" />
-		<label class="hidden" for="plugin-search-input"><?php _e('Search Plugins'); ?></label>
+		<label class="invisible" for="plugin-search-input"><?php _e('Search Plugins'); ?></label>
 		<input type="submit" id="plugin-search-input" name="search" value="<?php _ea('Search Plugins') ?>" class="button" />
 	</form><?php
 }
@@ -211,7 +211,7 @@ function install_plugins_upload( $page = 1 ) {
 	<p class="install-help"><?php _e('If you have a plugin in a .zip format, You may install it by uploading it here.') ?></p>
 	<form method="post" enctype="multipart/form-data" action="<?php echo admin_url('update.php?action=upload-plugin') ?>">
 		<?php wp_nonce_field( 'plugin-upload') ?>
-		<label class="hidden" for="pluginzip"><?php _e('Plugin zip file'); ?></label>
+		<label class="invisible" for="pluginzip"><?php _e('Plugin zip file'); ?></label>
 		<input type="file" id="pluginzip" name="pluginzip" />
 		<input type="submit" class="button" value="<?php _ea('Install Now') ?>" />
 	</form>
diff --git a/wp-admin/includes/template.php b/wp-admin/includes/template.php
index aee24f7976..08f2fc58de 100644
--- a/wp-admin/includes/template.php
+++ b/wp-admin/includes/template.php
@@ -3162,7 +3162,7 @@ function find_posts_div($found_action = '') {
 
 				<input type="hidden" name="affected" id="affected" value="" />
 				<?php wp_nonce_field( 'find-posts', '_ajax_nonce', false ); ?>
-				<label class="hidden" for="find-posts-input"><?php _e( 'Search' ); ?></label>
+				<label class="invisible" for="find-posts-input"><?php _e( 'Search' ); ?></label>
 				<input type="text" id="find-posts-input" name="ps" value="" />
 				<input type="button" onclick="findPosts.send();" value="<?php _ea( 'Search' ); ?>" class="button" /><br />
 
diff --git a/wp-admin/link-manager.php b/wp-admin/link-manager.php
index 2041ea4c82..b676ba4147 100644
--- a/wp-admin/link-manager.php
+++ b/wp-admin/link-manager.php
@@ -88,7 +88,7 @@ if ( isset($_GET['deleted']) ) {
 
 <form class="search-form" action="" method="get">
 <p class="search-box">
-	<label class="hidden" for="link-search-input"><?php _e( 'Search Links' ); ?>:</label>
+	<label class="invisible" for="link-search-input"><?php _e( 'Search Links' ); ?>:</label>
 	<input type="text" id="link-search-input" name="s" value="<?php _admin_search_query(); ?>" />
 	<input type="submit" value="<?php _ea( 'Search Links' ); ?>" class="button" />
 </p>
diff --git a/wp-admin/options-discussion.php b/wp-admin/options-discussion.php
index 383b0792d5..6899961d75 100644
--- a/wp-admin/options-discussion.php
+++ b/wp-admin/options-discussion.php
@@ -25,7 +25,7 @@ include('admin-header.php');
 <table class="form-table">
 <tr valign="top">
 <th scope="row"><?php _e('Default article settings') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('Default article settings') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Default article settings') ?></legend>
 <label for="default_pingback_flag">
 <input name="default_pingback_flag" type="checkbox" id="default_pingback_flag" value="1" <?php checked('1', get_option('default_pingback_flag')); ?> />
 <?php _e('Attempt to notify any blogs linked to from the article (slows down posting.)') ?></label>
@@ -43,7 +43,7 @@ include('admin-header.php');
 </tr>
 <tr valign="top">
 <th scope="row"><?php _e('Other comment settings') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('Other comment settings') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Other comment settings') ?></legend>
 <label for="require_name_email"><input type="checkbox" name="require_name_email" id="require_name_email" value="1" <?php checked('1', get_option('require_name_email')); ?> /> <?php _e('Comment author must fill out name and e-mail') ?></label>
 <br />
 <label for="comment_registration">
@@ -102,7 +102,7 @@ printf( __('Comments should be displayed with the %s comments at the top of each
 </tr>
 <tr valign="top">
 <th scope="row"><?php _e('E-mail me whenever') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('E-mail me whenever') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('E-mail me whenever') ?></legend>
 <label for="comments_notify">
 <input name="comments_notify" type="checkbox" id="comments_notify" value="1" <?php checked('1', get_option('comments_notify')); ?> />
 <?php _e('Anyone posts a comment') ?> </label>
@@ -114,7 +114,7 @@ printf( __('Comments should be displayed with the %s comments at the top of each
 </tr>
 <tr valign="top">
 <th scope="row"><?php _e('Before a comment appears') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('Before a comment appears') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Before a comment appears') ?></legend>
 <label for="comment_moderation">
 <input name="comment_moderation" type="checkbox" id="comment_moderation" value="1" <?php checked('1', get_option('comment_moderation')); ?> />
 <?php _e('An administrator must always approve the comment') ?> </label>
@@ -124,7 +124,7 @@ printf( __('Comments should be displayed with the %s comments at the top of each
 </tr>
 <tr valign="top">
 <th scope="row"><?php _e('Comment Moderation') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('Comment Moderation') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Comment Moderation') ?></legend>
 <p><label for="comment_max_links"><?php printf(__('Hold a comment in the queue if it contains %s or more links. (A common characteristic of comment spam is a large number of hyperlinks.)'), '<input name="comment_max_links" type="text" id="comment_max_links" value="' . attr(get_option('comment_max_links')) . '" class="small-text" />' ) ?></label></p>
 
 <p><label for="moderation_keys"><?php _e('When a comment contains any of these words in its content, name, URL, e-mail, or IP, it will be held in the <a href="edit-comments.php?comment_status=moderated">moderation queue</a>. One word or IP per line. It will match inside words, so "press" will match "WordPress".') ?></label></p>
@@ -135,7 +135,7 @@ printf( __('Comments should be displayed with the %s comments at the top of each
 </tr>
 <tr valign="top">
 <th scope="row"><?php _e('Comment Blacklist') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('Comment Blacklist') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Comment Blacklist') ?></legend>
 <p><label for="blacklist_keys"><?php _e('When a comment contains any of these words in its content, name, URL, e-mail, or IP, it will be marked as spam. One word or IP per line. It will match inside words, so "press" will match "WordPress".') ?></label></p>
 <p>
 <textarea name="blacklist_keys" rows="10" cols="50" id="blacklist_keys" class="large-text code"><?php form_option('blacklist_keys'); ?></textarea>
@@ -154,7 +154,7 @@ printf( __('Comments should be displayed with the %s comments at the top of each
 <table class="form-table">
 <tr valign="top">
 <th scope="row"><?php _e('Avatar Display') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('Avatar display') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Avatar display') ?></legend>
 <?php
 	$yesorno = array(0 => __("Don&#8217;t show Avatars"), 1 => __('Show Avatars'));
 	foreach ( $yesorno as $key => $value) {
@@ -166,7 +166,7 @@ printf( __('Comments should be displayed with the %s comments at the top of each
 </tr>
 <tr valign="top">
 <th scope="row"><?php _e('Maximum Rating') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('Maximum Rating') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Maximum Rating') ?></legend>
 
 <?php
 $ratings = array( 'G' => __('G &#8212; Suitable for all audiences'), 'PG' => __('PG &#8212; Possibly offensive, usually for audiences 13 and above'), 'R' => __('R &#8212; Intended for adult audiences above 17'), 'X' => __('X &#8212; Even more mature than above'));
@@ -180,7 +180,7 @@ endforeach;
 </tr>
 <tr valign="top">
 <th scope="row"><?php _e('Default Avatar') ?></th>
-<td class="defaultavatarpicker"><fieldset><legend class="hidden"><?php _e('Default Avatar') ?></legend>
+<td class="defaultavatarpicker"><fieldset><legend class="invisible"><?php _e('Default Avatar') ?></legend>
 
 <?php _e('For users without a custom avatar of their own, you can either display a generic logo or a generated one based on their e-mail address.'); ?><br />
 
diff --git a/wp-admin/options-general.php b/wp-admin/options-general.php
index 23515d07f7..3d28440fb8 100644
--- a/wp-admin/options-general.php
+++ b/wp-admin/options-general.php
@@ -83,7 +83,7 @@ include('./admin-header.php');
 </tr>
 <tr valign="top">
 <th scope="row"><?php _e('Membership') ?></th>
-<td> <fieldset><legend class="hidden"><?php _e('Membership') ?></legend><label for="users_can_register">
+<td> <fieldset><legend class="invisible"><?php _e('Membership') ?></legend><label for="users_can_register">
 <input name="users_can_register" type="checkbox" id="users_can_register" value="1" <?php checked('1', get_option('users_can_register')); ?> />
 <?php _e('Anyone can register') ?></label>
 </fieldset></td>
@@ -197,7 +197,7 @@ if (empty($tzstring)) { // set the Etc zone if no timezone string exists
 <tr>
 <th scope="row"><?php _e('Date Format') ?></th>
 <td>
-	<fieldset><legend class="hidden"><?php _e('Date Format') ?></legend>
+	<fieldset><legend class="invisible"><?php _e('Date Format') ?></legend>
 <?php
 
 	$date_formats = apply_filters( 'date_formats', array(
@@ -230,7 +230,7 @@ if (empty($tzstring)) { // set the Etc zone if no timezone string exists
 <tr>
 <th scope="row"><?php _e('Time Format') ?></th>
 <td>
-	<fieldset><legend class="hidden"><?php _e('Time Format') ?></legend>
+	<fieldset><legend class="invisible"><?php _e('Time Format') ?></legend>
 <?php
 
 	$time_formats = apply_filters( 'time_formats', array(
diff --git a/wp-admin/options-media.php b/wp-admin/options-media.php
index 0d5f2e3efa..cfecbb0663 100644
--- a/wp-admin/options-media.php
+++ b/wp-admin/options-media.php
@@ -41,7 +41,7 @@ include('admin-header.php');
 
 <tr valign="top">
 <th scope="row"><?php _e('Medium size') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('Medium size') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Medium size') ?></legend>
 <label for="medium_size_w"><?php _e('Max Width'); ?></label>
 <input name="medium_size_w" type="text" id="medium_size_w" value="<?php form_option('medium_size_w'); ?>" class="small-text" />
 <label for="medium_size_h"><?php _e('Max Height'); ?></label>
@@ -51,7 +51,7 @@ include('admin-header.php');
 
 <tr valign="top">
 <th scope="row"><?php _e('Large size') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('Large size') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Large size') ?></legend>
 <label for="large_size_w"><?php _e('Max Width'); ?></label>
 <input name="large_size_w" type="text" id="large_size_w" value="<?php form_option('large_size_w'); ?>" class="small-text" />
 <label for="large_size_h"><?php _e('Max Height'); ?></label>
diff --git a/wp-admin/options-privacy.php b/wp-admin/options-privacy.php
index 862681b478..e255ae768a 100644
--- a/wp-admin/options-privacy.php
+++ b/wp-admin/options-privacy.php
@@ -25,7 +25,7 @@ include('./admin-header.php');
 <table class="form-table">
 <tr valign="top">
 <th scope="row"><?php _e('Blog Visibility') ?> </th>
-<td><fieldset><legend class="hidden"><?php _e('Blog Visibility') ?> </legend>
+<td><fieldset><legend class="invisible"><?php _e('Blog Visibility') ?> </legend>
 <p><input id="blog-public" type="radio" name="blog_public" value="1" <?php checked('1', get_option('blog_public')); ?> />
 <label for="blog-public"><?php _e('I would like my blog to be visible to everyone, including search engines (like Google, Sphere, Technorati) and archivers');?></label></p>
 <p><input id="blog-norobots" type="radio" name="blog_public" value="0" <?php checked('0', get_option('blog_public')); ?> />
diff --git a/wp-admin/options-reading.php b/wp-admin/options-reading.php
index 934caf2688..2757eacb30 100644
--- a/wp-admin/options-reading.php
+++ b/wp-admin/options-reading.php
@@ -26,7 +26,7 @@ include('admin-header.php');
 <?php if ( get_pages() ): ?>
 <tr valign="top">
 <th scope="row"><?php _e('Front page displays')?></th>
-<td><fieldset><legend class="hidden"><?php _e('Front page displays')?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Front page displays')?></legend>
 	<p><label>
 		<input name="show_on_front" type="radio" value="posts" class="tog" <?php checked('posts', get_option('show_on_front')); ?> />
 		<?php _e('Your latest posts'); ?>
@@ -63,7 +63,7 @@ include('admin-header.php');
 </tr>
 <tr valign="top">
 <th scope="row"><?php _e('For each article in a feed, show') ?> </th>
-<td><fieldset><legend class="hidden"><?php _e('For each article in a feed, show') ?> </legend>
+<td><fieldset><legend class="invisible"><?php _e('For each article in a feed, show') ?> </legend>
 <p><label><input name="rss_use_excerpt"  type="radio" value="0" <?php checked(0, get_option('rss_use_excerpt')); ?>	/> <?php _e('Full text') ?></label><br />
 <label><input name="rss_use_excerpt" type="radio" value="1" <?php checked(1, get_option('rss_use_excerpt')); ?> /> <?php _e('Summary') ?></label></p>
 </fieldset></td>
diff --git a/wp-admin/options-writing.php b/wp-admin/options-writing.php
index ab148ed22d..8eeac3a463 100644
--- a/wp-admin/options-writing.php
+++ b/wp-admin/options-writing.php
@@ -30,7 +30,7 @@ include('admin-header.php');
 </tr>
 <tr valign="top">
 <th scope="row"><?php _e('Formatting') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('Formatting') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Formatting') ?></legend>
 <label for="use_smilies">
 <input name="use_smilies" type="checkbox" id="use_smilies" value="1" <?php checked('1', get_option('use_smilies')); ?> />
 <?php _e('Convert emoticons like <code>:-)</code> and <code>:-P</code> to graphics on display') ?></label><br />
@@ -61,7 +61,7 @@ wp_dropdown_categories(array('hide_empty' => 0, 'name' => 'default_link_category
 <table class="form-table">
 <tr valign="top">
 <th scope="row"><?php _e('Atom Publishing Protocol') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('Atom Publishing Protocol') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Atom Publishing Protocol') ?></legend>
 <label for="enable_app">
 <input name="enable_app" type="checkbox" id="enable_app" value="1" <?php checked('1', get_option('enable_app')); ?> />
 <?php _e('Enable the Atom Publishing Protocol.') ?></label><br />
@@ -69,7 +69,7 @@ wp_dropdown_categories(array('hide_empty' => 0, 'name' => 'default_link_category
 </tr>
 <tr valign="top">
 <th scope="row"><?php _e('XML-RPC') ?></th>
-<td><fieldset><legend class="hidden"><?php _e('XML-RPC') ?></legend>
+<td><fieldset><legend class="invisible"><?php _e('XML-RPC') ?></legend>
 <label for="enable_xmlrpc">
 <input name="enable_xmlrpc" type="checkbox" id="enable_xmlrpc" value="1" <?php checked('1', get_option('enable_xmlrpc')); ?> />
 <?php _e('Enable the WordPress, Movable Type, MetaWeblog and Blogger XML-RPC publishing protocols.') ?></label><br />
diff --git a/wp-admin/plugins.php b/wp-admin/plugins.php
index 2a546b0ba8..c31019c933 100644
--- a/wp-admin/plugins.php
+++ b/wp-admin/plugins.php
@@ -424,7 +424,7 @@ function print_plugin_actions($context) {
 
 <form method="get" action="">
 <p class="search-box">
-	<label class="hidden" for="plugin-search-input"><?php _e( 'Search Plugins' ); ?>:</label>
+	<label class="invisible" for="plugin-search-input"><?php _e( 'Search Plugins' ); ?>:</label>
 	<input type="text" id="plugin-search-input" name="s" value="<?php _admin_search_query(); ?>" />
 	<input type="submit" value="<?php _ea( 'Search Plugins' ); ?>" class="button" />
 </p>
diff --git a/wp-admin/press-this.php b/wp-admin/press-this.php
index 85ec8bd195..9747fa78aa 100644
--- a/wp-admin/press-this.php
+++ b/wp-admin/press-this.php
@@ -481,8 +481,8 @@ var ajaxurl = '<?php echo admin_url('admin-ajax.php'); ?>';
 					<div id="category-adder" class="wp-hidden-children">
 						<a id="category-add-toggle" href="#category-add" class="hide-if-no-js" tabindex="3"><?php _e( '+ Add New Category' ); ?></a>
 						<p id="category-add" class="wp-hidden-child">
-							<label class="hidden" for="newcat"><?php _e( 'Add New Category' ); ?></label><input type="text" name="newcat" id="newcat" class="form-required form-input-tip" value="<?php _ea( 'New category name' ); ?>" tabindex="3" aria-required="true"/>
-							<label class="hidden" for="newcat_parent"><?php _e('Parent category'); ?>:</label><?php wp_dropdown_categories( array( 'hide_empty' => 0, 'name' => 'newcat_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => __('Parent category'), 'tab_index' => 3 ) ); ?>
+							<label class="invisible" for="newcat"><?php _e( 'Add New Category' ); ?></label><input type="text" name="newcat" id="newcat" class="form-required form-input-tip" value="<?php _ea( 'New category name' ); ?>" tabindex="3" aria-required="true"/>
+							<label class="invisible" for="newcat_parent"><?php _e('Parent category'); ?>:</label><?php wp_dropdown_categories( array( 'hide_empty' => 0, 'name' => 'newcat_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => __('Parent category'), 'tab_index' => 3 ) ); ?>
 							<input type="button" id="category-add-sumbit" class="add:categorychecklist:category-add button" value="<?php _ea( 'Add' ); ?>" tabindex="3" />
 							<?php wp_nonce_field( 'add-category', '_ajax_nonce', false ); ?>
 							<span id="category-ajax-response"></span>
@@ -496,7 +496,7 @@ var ajaxurl = '<?php echo admin_url('admin-ajax.php'); ?>';
 				<div class="inside">
 					<div class="tagsdiv" id="post_tag">
 						<p class="jaxtag">
-							<label class="hidden" for="newtag"><?php _e('Post Tags'); ?></label>
+							<label class="invisible" for="newtag"><?php _e('Post Tags'); ?></label>
 							<input type="hidden" name="tax_input[post_tag]" class="the-tags" id="tax-input[post_tag]" value="" />
 							<span class="ajaxtag" style="display:none;">
 								<input type="text" name="newtag[post_tag]" class="newtag form-input-tip" size="16" autocomplete="off" value="<?php _ea('Add new tag'); ?>" />
diff --git a/wp-admin/upload.php b/wp-admin/upload.php
index b01f7a08aa..0bd1f17ad6 100644
--- a/wp-admin/upload.php
+++ b/wp-admin/upload.php
@@ -209,7 +209,7 @@ unset($type_links);
 
 <form class="search-form" action="" method="get">
 <p class="search-box">
-	<label class="hidden" for="media-search-input"><?php _e( 'Search Media' ); ?>:</label>
+	<label class="invisible" for="media-search-input"><?php _e( 'Search Media' ); ?>:</label>
 	<input type="text" id="media-search-input" name="s" value="<?php the_search_query(); ?>" />
 	<input type="submit" value="<?php _ea( 'Search Media' ); ?>" class="button" />
 </p>
diff --git a/wp-admin/user-edit.php b/wp-admin/user-edit.php
index a64a9f178a..43e052b69f 100644
--- a/wp-admin/user-edit.php
+++ b/wp-admin/user-edit.php
@@ -209,7 +209,7 @@ include ('admin-header.php');
 <?php if (count($_wp_admin_css_colors) > 1 ) : ?>
 <tr>
 <th scope="row"><?php _e('Admin Color Scheme')?></th>
-<td><fieldset><legend class="hidden"><?php _e('Admin Color Scheme')?></legend>
+<td><fieldset><legend class="invisible"><?php _e('Admin Color Scheme')?></legend>
 <?php
 $current_color = get_user_option('admin_color', $user_id);
 if ( empty($current_color) )
diff --git a/wp-admin/users.php b/wp-admin/users.php
index a180fae986..a297d461b2 100644
--- a/wp-admin/users.php
+++ b/wp-admin/users.php
@@ -290,7 +290,7 @@ unset($role_links);
 
 <form class="search-form" action="" method="get">
 <p class="search-box">
-	<label class="hidden" for="user-search-input"><?php _e( 'Search Users' ); ?>:</label>
+	<label class="invisible" for="user-search-input"><?php _e( 'Search Users' ); ?>:</label>
 	<input type="text" id="user-search-input" name="usersearch" value="<?php echo attr($wp_user_search->search_term); ?>" />
 	<input type="submit" value="<?php _ea( 'Search Users' ); ?>" class="button" />
 </p>
@@ -309,7 +309,7 @@ unset($role_links);
 <option value="delete"><?php _e('Delete'); ?></option>
 </select>
 <input type="submit" value="<?php _ea('Apply'); ?>" name="doaction" id="doaction" class="button-secondary action" />
-<label class="hidden" for="new_role"><?php _e('Change role to&hellip;') ?></label><select name="new_role" id="new_role"><option value=''><?php _e('Change role to&hellip;') ?></option><?php wp_dropdown_roles(); ?></select>
+<label class="invisible" for="new_role"><?php _e('Change role to&hellip;') ?></label><select name="new_role" id="new_role"><option value=''><?php _e('Change role to&hellip;') ?></option><?php wp_dropdown_roles(); ?></select>
 <input type="submit" value="<?php _ea('Change'); ?>" name="changeit" class="button-secondary" />
 <?php wp_nonce_field('bulk-users'); ?>
 </div>
diff --git a/wp-includes/general-template.php b/wp-includes/general-template.php
index 67a6fcba08..695aa85b5e 100644
--- a/wp-includes/general-template.php
+++ b/wp-includes/general-template.php
@@ -119,7 +119,7 @@ function get_search_form() {
 		return;
 
 	$form = '<form role="search" method="get" id="searchform" action="' . get_option('home') . '/" >
-	<div><label class="hidden" for="s">' . __('Search for:') . '</label>
+	<div><label class="invisible" for="s">' . __('Search for:') . '</label>
 	<input type="text" value="' . attr(apply_filters('the_search_query', get_search_query())) . '" name="s" id="s" />
 	<input type="submit" id="searchsubmit" value="'. _a('Search') .'" />
 	</div>