.clear{
       clear:both;/*stops the floats from floating stuff you don't want floated*/
       height:35px;/*gives some space*/
       }



.gallery {/*instead of adding more divs use the ones already added by the scripts*/
	margin: 10px auto;
	text-align: center; 
	}
/*the thumbs*/
.gallery-item {
	float: left;
	width: 150px;
    height:112px; 
	margin: 10px;
    padding:10px;
	text-align: center;
	}

.gallery img {
	border: 1px solid #f9f9f9;
	}
*/the caption*/
.gallery-caption {
	margin-left: 0;
	}
I had to change this css fob's plugin gets rid of the other gallery.css and the detailed list html that wp-includes/media.php adds.
Get fob's plugin if you want a valid gallery page or post.
http://www.fob-marketing.de/marketing-blog-647-wordpress-25-gallery-validation-plugin.html


And here is the absolutely default image.php All I added was my h2 class and my content and etc divs.


	### Please remember my html may not jibe with your html#######
	
	
			
		<?php get_header(); ?>

	<div id="content class="narrowcolumn"> <!--or widecolumn-->

  <?php if (have_posts()) : while (have_posts()) : the_post(); ?>

		<div class="post" id="post-<?php the_ID(); ?>">
			<h2 class="page_title"><a href="<?php echo get_permalink($post->post_parent); ?>" rev="attachment"><?php echo get_the_title($post->post_parent); ?></a> &raquo; <?php the_title(); ?></h2>
			<div class="entry">
<a href="<?php echo wp_get_attachment_url($post->ID); ?>"><?php echo wp_get_attachment_image( $post->ID, 'medium' ); ?></a>
                <?php if ( !empty($post->post_excerpt) ) the_excerpt(); // this is the "caption" ?>

				<?php the_content('<p class="serif">Read the rest of this entry &raquo;</p>'); ?>

				<div class="navigation">
					<div class="alignleft"><?php previous_image_link() ?></div>
					<div class="alignright"><?php next_image_link() ?></div>
				</div>
				<br class="clear" /><!--stops the floating-->

				<p class="postmetadata alt">
					<small>
						This entry was posted on <?php the_time('l, F jS, Y') ?> at <?php the_time() ?>
						and is filed under <?php the_category(', ') ?>.
						<?php the_taxonomies(); ?>
						You can follow any responses to this entry through the <?php post_comments_feed_link('RSS 2.0'); ?> feed.

						<?php if (('open' == $post-> comment_status) && ('open' == $post->ping_status)) {
							// Both Comments and Pings are open ?>
							You can <a href="#respond">leave a response</a>, or <a href="<?php trackback_url(); ?>" rel="trackback">trackback</a> from your own site.

						<?php } elseif (!('open' == $post-> comment_status) && ('open' == $post->ping_status)) {
							// Only Pings are Open ?>
							Responses are currently closed, but you can <a href="<?php trackback_url(); ?> " rel="trackback">trackback</a> from your own site.

						<?php } elseif (('open' == $post-> comment_status) && !('open' == $post->ping_status)) {
							// Comments are open, Pings are not ?>
							You can skip to the end and leave a response. Pinging is currently not allowed.

						<?php } elseif (!('open' == $post-> comment_status) && !('open' == $post->ping_status)) {
							// Neither Comments, nor Pings are open ?>
							Both comments and pings are currently closed.

						<?php } edit_post_link('Edit this entry.','',''); ?>

					</small>
				</p>

			</div><!--/entry-->
<?php comments_template(); ?> <!--moved inside post div to avoid further divitis-->
		</div><!--/post-->

	

	<?php endwhile; else: ?>

		<p>Sorry, no attachments matched your criteria.</p>

<?php endif; ?>

	</div><!--/content-->
<?php get_sidebar(); ?>
<?php get_footer(); ?>