Text margins different in IE and Firefox

I just recently noticed (I’ve had my blog up for about a year, I don’t recall it being like this before, not sure when it chaged) that while the entry text of my blog looks fine in Firefox, the text has a bigger margin on the right side using IE. The blog address is http://www.cruzcontroller.com/blog .

I am using the Kubrick layout that came with WP 1.5. I have modified it, but nothing to do with margins or text layout, just colors and such. I know that if solveable this has to be a CSS issue, but I have fooled with some tags and can’t seem to make anything useful. The blog layout (that is, the header, footer, and the relation of the main part to the sidebar) is identical on both IE and Firefox, it is just the text of the entries that is different. On both browsers the left side margin is identical, but on FF the right side margin is the same size as the left, while in IE it is much bigger. When you select a post and go to the page for that specific post they both look the same, so this is only on the main page (with the sidebar).

Any ideas or help would be appreciated. I hope I explained it ok…if you can’t see it or need clarification please let me know. I am using screen resolution 1280X1024 if that means anything.

Oh, and duh, I prefer the Firefox view, so I would like the IE view to look as the Firefox one does.

Thanks!

Michael Cruz