I finally decided to bite the bullet and upgrade my 1.5 install to 2.0.2. I had been putting it off as I didn't have the time to deal if something went wrong, usually something with IE. So, well, here we are. lol. The upgrade went fine, but now something is messed in IE and it seems to be related to my stylesheet.
I tried loading the default theme, works pretty much ok. Tried removing the CSS file from my server, which interestingly enough makes IE peg the processor and you have to kill the process OR it was also somehow still seeming to load the file even though it didn't exist (?!?! Yeah, cleared the browser cache). Tried removing the link to the CSS file in the html with obvious results, no stylesheet, but the posts seem to flow and not cascade like they do in IE currently, which makes me think it's the stylesheet over some change in the php somewhere (via the upgrade to 2.0.2) - though I haven't ruled that out either.
I also tried editing the CSS in a live viewer for IE, but wasn't able to find the offending code at least where I thought it might be.
Anyone have any thoughts? Thanks in advance.