I've been having this problem at on my website. (www.overheadfilms.com)
It only happens in Firefox browser, and not Internet Explorer or anything. The problem is that if I have more than one post per page, everything gets all messed up and on top of each other. I know a good amount of PHP, HTML, and CSS, but none of that has helped me. I've been looking at the scripts for a few weeks now and can't find any problem, so I'm posting here now. If someone could help me out that would be great.
PS - I've tried several different themes, including the default theme.