Whitepress theme has some problems with Internet Explorer 7. This is not related to version of my WordPress, because it is also present in preview that you can find here.
Bug: using IE7, go to http://wp-themes.com/whitepress/.
And then click on "Worth A Thousand Words" to view full post. Voila! The sidebar went down, right under the post and comment box.
I've spent a couple of hours and didn't figure out how to fix it.