Well Wordpress is pretty key to my website, Ive had many a problem with IE but now its a major problem, as you can see (link removed due to possible malware; see history for link).
Firefox, Chrome, Safari are great, including the latest version of IE I think, but IE 7 does not show the scroll bar or page down.
Any ideas what could be making this happen?
I'm scared to help simply because when I go to your site I get a suspected malware warning. Perhaps that's an issue you should fix first.
Perhaps this answer is out of place but is an important notice. Is there a reason you have jl.chura.pl/ in a hidden iframe?
You're missing a closing div tag according to Total Validator. To debug, I'd grab the source of the page, dump it in an editor, and begin deleting matching <div>...</div> sets.
Also, remember that id attributes are unique to the entire document. You have a few duplicates and that's going to cause you problems as well.