diff --git a/wp-admin/edit-form-advanced.php b/wp-admin/edit-form-advanced.php
index c8f5e099c7..a0dff5db0d 100644
--- a/wp-admin/edit-form-advanced.php
+++ b/wp-admin/edit-form-advanced.php
@@ -170,12 +170,12 @@ if ( 'private' == $post->post_status ) {
 
 <div id="post-visibility-select" class="hide-if-js">
 <input type="hidden" name="hidden_post_password" id="hidden-post-password" value="<?php echo attribute_escape($post->post_password); ?>" />
-<input type="checkbox" style="display:none" name="hidden_post_sticky" id="hidden-post-sticky" value="sticky" <?php checked(is_sticky($post->ID), true); ?> />
+<input type="checkbox" style="display:none" name="hidden_post_sticky" id="hidden-post-sticky" value="sticky" <?php checked(is_sticky($post->ID)); ?> />
 <input type="hidden" name="hidden_post_visibility" id="hidden-post-visibility" value="<?php echo attribute_escape( $visibility ); ?>" />
 
 
 <input type="radio" name="visibility" id="visibility-radio-public" value="public" <?php checked( $visibility, 'public' ); ?> /> <label for="visibility-radio-public" class="selectit"><?php _e('Public'); ?></label><br />
-<span id="sticky-span"><input id="sticky" name="sticky" type="checkbox" value="sticky" <?php checked(is_sticky($post->ID), true); ?> tabindex="4" /> <label for="sticky" class="selectit"><?php _e('Stick this post to the front page') ?></label><br /></span>
+<span id="sticky-span"><input id="sticky" name="sticky" type="checkbox" value="sticky" <?php checked(is_sticky($post->ID)); ?> tabindex="4" /> <label for="sticky" class="selectit"><?php _e('Stick this post to the front page') ?></label><br /></span>
 <input type="radio" name="visibility" id="visibility-radio-password" value="password" <?php checked( $visibility, 'password' ); ?> /> <label for="visibility-radio-password" class="selectit"><?php _e('Password protected'); ?></label><br />
 <span id="password-span"><label for="post_password"><?php _e('Password:'); ?></label> <input type="text" name="post_password" id="post_password" value="<?php echo attribute_escape($post->post_password); ?>" /><br /></span>
 <input type="radio" name="visibility" id="visibility-radio-private" value="private" <?php checked( $visibility, 'private' ); ?> /> <label for="visibility-radio-private" class="selectit"><?php _e('Private'); ?></label><br />
diff --git a/wp-admin/options-general.php b/wp-admin/options-general.php
index f302e5fbef..d1f7308dcd 100644
--- a/wp-admin/options-general.php
+++ b/wp-admin/options-general.php
@@ -153,7 +153,7 @@ foreach ( $offset_range as $offset ) {
 	}
 
 	echo '	<label><input type="radio" name="date_format" id="date_format_custom_radio" value="\c\u\s\t\o\m"';
-	checked( $custom, TRUE );
+	checked( $custom );
 	echo '/> ' . __('Custom:') . ' </label><input type="text" name="date_format_custom" value="' . attribute_escape( get_option('date_format') ) . '" class="small-text" /> ' . date_i18n( get_option('date_format') ) . "\n";
 
 	echo "\t<p>" . __('<a href="http://codex.wordpress.org/Formatting_Date_and_Time">Documentation on date formatting</a>. Click "Save Changes" to update sample output.') . "</p>\n";
@@ -185,7 +185,7 @@ foreach ( $offset_range as $offset ) {
 	}
 
 	echo '	<label><input type="radio" name="time_format" id="time_format_custom_radio" value="\c\u\s\t\o\m"';
-	checked( $custom, TRUE );
+	checked( $custom );
 	echo '/> ' . __('Custom:') . ' </label><input type="text" name="time_format_custom" value="' . attribute_escape( get_option('time_format') ) . '" class="small-text" /> ' . date_i18n( get_option('time_format') ) . "\n";
 ?>
 	</fieldset>
diff --git a/wp-includes/widgets.php b/wp-includes/widgets.php
index 817d9689c6..9f95567ecb 100644
--- a/wp-includes/widgets.php
+++ b/wp-includes/widgets.php
@@ -1195,17 +1195,17 @@ function wp_widget_categories_control( $widget_args ) {
 
 			<p>
 				<label for="categories-dropdown-<?php echo $number; ?>">
-					<input type="checkbox" class="checkbox" id="categories-dropdown-<?php echo $number; ?>" name="widget-categories[<?php echo $number; ?>][dropdown]"<?php checked( $dropdown, true ); ?> />
+					<input type="checkbox" class="checkbox" id="categories-dropdown-<?php echo $number; ?>" name="widget-categories[<?php echo $number; ?>][dropdown]"<?php checked( $dropdown ); ?> />
 					<?php _e( 'Show as dropdown' ); ?>
 				</label>
 				<br />
 				<label for="categories-count-<?php echo $number; ?>">
-					<input type="checkbox" class="checkbox" id="categories-count-<?php echo $number; ?>" name="widget-categories[<?php echo $number; ?>][count]"<?php checked( $count, true ); ?> />
+					<input type="checkbox" class="checkbox" id="categories-count-<?php echo $number; ?>" name="widget-categories[<?php echo $number; ?>][count]"<?php checked( $count ); ?> />
 					<?php _e( 'Show post counts' ); ?>
 				</label>
 				<br />
 				<label for="categories-hierarchical-<?php echo $number; ?>">
-					<input type="checkbox" class="checkbox" id="categories-hierarchical-<?php echo $number; ?>" name="widget-categories[<?php echo $number; ?>][hierarchical]"<?php checked( $hierarchical, true ); ?> />
+					<input type="checkbox" class="checkbox" id="categories-hierarchical-<?php echo $number; ?>" name="widget-categories[<?php echo $number; ?>][hierarchical]"<?php checked( $hierarchical ); ?> />
 					<?php _e( 'Show hierarchy' ); ?>
 				</label>
 			</p>