Ok, i tried everything and honestly have no clue where the problem lays. I use slightly outdated WP version (downloaded in december 2006, never upgraded since then) and now I decided to give it a fresh look and change the theme. The problem is in Firefox (as in IE it won't display properly). If u go to this page http://www.toptut.com/?cat=7 u will see that second post is missing a background stripe. All posts are using same configs and layout, that post has no extra attributes, so it's a total mystery to me why the hell this problem popped up.. anyone can help? thanks in advance
Have you added any plugin recently or added any php code in sidebar ? Seems some plugin problem.. Try de-activating the plugins and checking again.