Actually you posted your request a week ago, to be precise :)
Did you do what skulled suggested when he replied to your initial request? Because I don't see your corresponding reply.
1. Check your widths in the CSS and make sure none of the posts are making any trouble.
2. Check for un-closed containers in the (X)HTML code ..
3. And perhaps you might want to validate your document a little better, that would help a lot in seeing what might be going wrong. You have a whopping 432 errors in your XHTML Strict DOCTYPE validation .. :D
Validating your html helps a lot, believe me. If your page isn't coded correctly, then all the world's best css won't fix or even correct your problems.
A single html page can only display what you code into it, hence why you MUST validate first. And, for the record, x/html is stuff like this...
it is also stuff like this...
<span>,[p], <blockquote>, <img src>
I strongly recommend, for ease of design/validating, that if you don't already have FireFox downloaded on your computer, then do so.
It's free and it makes checking a battery of stuff dead easy. You can even do it - corrections and design changes -on the fly.
You don't have to like FF, but it is the only browser, truly, that allows minute changes without being overly complex.
I use all five browsers (FF, Moz, Opera, IE6 & Net) to check my stuff as I go along. I use to have a preference for IE & Opera, but I've since been converted to FF because it is easy to use.