WordPress/wp-content/themes/twentyten/attachment.php

<?php
/**
 * The template used to display attachments.
 *
 * @package WordPress
 * @subpackage Twenty Ten
 * @since 3.0.0
 */
?>

<?php get_header(); ?>

		<div id="container">
			<div id="content">

<?php the_post(); ?>

				<p class="page-title"><a href="<?php echo get_permalink( $post->post_parent ); ?>" title="<?php printf( esc_attr__( 'Return to %s', 'twentyten' ), esc_html( get_the_title( $post->post_parent ), 1 ) ); ?>" rel="gallery">&larr; <?php echo get_the_title( $post->post_parent ); ?></a></p>

				<div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
					<h2 class="entry-title"><?php the_title(); ?></h2>

					<div class="entry-meta">
						<?php
							printf(__( '<span class="meta-prep meta-prep-author"> By </span> <span class="author vcard"><a class="url fn n" href="%1$s" title="%2$s">%3$s</a></span>', 'twentyten'),
								get_author_posts_url( get_the_author_meta( 'ID' ) ),
								sprintf( esc_attr__( 'View all posts by %s', 'twentyten' ), get_the_author() ),
								get_the_author()
							);
						?>
						<span class="meta-sep"> | </span>
						<?php
							printf( __( '<span class="meta-prep meta-prep-entry-date">Published </span> <span class="entry-date"><abbr class="published" title="%1$s">%2$s</abbr></span>', 'twentyten'),
								esc_attr( get_the_time() ),
								get_the_date()
							);
							if ( wp_attachment_is_image() ) {
								$size = getimagesize( wp_get_attachment_url() );
								printf( __( ' at <a href="%1$s" title="Link to full-size image">%2$s &times; %3$s</a>', 'twentyten'),
									wp_get_attachment_url(),
									$size[0],
									$size[1]
								);
							}							
						?>
						<?php edit_post_link( __( 'Edit', 'twentyten' ), '<span class="meta-sep">|</span> <span class="edit-link">', '</span>' ); ?>
					</div><!-- .entry-meta -->

					<div class="entry-content">
						<div class="entry-attachment">
<?php if ( wp_attachment_is_image() ) : ?>
						<p class="attachment"><a href="<?php echo twentyten_get_next_attachment_url(); ?>" title="<?php echo esc_attr( get_the_title() ); ?>" rel="attachment"><?php
							$attachment_size = apply_filters( 'twentyten_attachment_size',  900 );
							echo wp_get_attachment_image( $post->ID, array( $attachment_size, 9999 ) ); // filterable image width with, essentially, no limit for image height.
						?></a></p>

						<div id="nav-below" class="navigation">
							<div class="nav-previous"><?php previous_image_link( false ); ?></div>
							<div class="nav-next"><?php next_image_link( false ); ?></div>
						</div><!-- #nav-below -->
<?php else : ?>
						<a href="<?php echo wp_get_attachment_url(); ?>" title="<?php echo esc_attr( get_the_title() ); ?>" rel="attachment"><?php echo basename( get_permalink() ); ?></a>
<?php endif; ?>
						</div>
						<div class="entry-caption"><?php if ( ! empty( $post->post_excerpt ) ) the_excerpt(); ?></div>

<?php the_content( __( 'Continue reading <span class="meta-nav">&rarr;</span>', 'twentyten' )  ); ?>
<?php wp_link_pages( array( 'before' => '<div class="page-link">' . __( 'Pages:', 'twentyten' ), 'after' => '</div>' ) ); ?>

					</div><!-- .entry-content -->

					<div class="entry-utility">
					<?php
						$tag_list = get_the_tag_list();
						if ( '' != $tag_list ) {
							$utility_text = __( 'This entry was posted in %1$s and tagged %2$s. Bookmark the <a href="%3$s" title="Permalink to %4$s" rel="bookmark">permalink</a>.', 'twentyten' );
						} else {
							$utility_text = __( 'This entry was posted in %1$s. Bookmark the <a href="%3$s" title="Permalink to %4$s" rel="bookmark">permalink</a>.', 'twentyten' );
						}
						printf(
							$utility_text,
							get_the_category_list( ', ' ),
							$tag_list,
							get_permalink(),
							the_title_attribute( 'echo=0' ),
							get_post_comments_feed_link()
						);
					?>

<?php if ( comments_open() && pings_open() ) : // Comments and trackbacks open ?>
						<?php printf( __( '<a class="comment-link" href="#respond" title="Post a comment">Post a comment</a> or leave a trackback: <a class="trackback-link" href="%s" title="Trackback URL for your post" rel="trackback">Trackback URL</a>.', 'twentyten' ), get_trackback_url() ); ?>
<?php elseif ( ! comments_open() && pings_open() ) : // Only trackbacks open ?>
						<?php printf( __( 'Comments are closed, but you can leave a trackback: <a class="trackback-link" href="%s" title="Trackback URL for your post" rel="trackback">Trackback URL</a>.', 'twentyten' ), get_trackback_url() ); ?>
<?php elseif ( comments_open() && ! pings_open() ) : // Only comments open ?>
						<?php _e( 'Trackbacks are closed, but you can <a class="comment-link" href="#respond" title="Post a comment">post a comment</a>.', 'twentyten' ); ?>
<?php elseif ( ! comments_open() && ! pings_open() ) : // Comments and trackbacks closed ?>
						<?php _e( 'Both comments and trackbacks are currently closed.', 'twentyten' ); ?>
<?php endif; ?>
<?php edit_post_link( __( 'Edit', 'twentyten' ), '<span class="edit-link">', '</span>' ); ?>
					</div><!-- .entry-utility -->
				</div><!-- #post-<?php the_ID(); ?> -->

<?php comments_template(); ?>

			</div><!-- #content -->
		</div><!-- #container -->

<?php get_footer(); ?>