Layout bad in IE but not FF

Haha, well that is quite embarrassing. I modified a plugin and I think that “MIGHT” have something to do with it. I put DIV tags in it. Is there a way to show perhaps my five most recent posts? If so if someone could point me into the right direction that would be great.

Thanks Otto, I will try to go through that… is there anything out of that validation that jumps out at you that would show my sidebar layout all messed up like that? Anything tagged with TWITTER, MYTWITTER, LATEST POST, FRESH POST is where it is happening. So I didn’t know if you saw anything that was obvious? Thanks again.