For my other wordpress installation (www.ff-pitten.at) I had the problem, that IE would not break (wrap) a line of many pictures into multiple lines (e.g. http://www.ff-pitten.at/2008/01/06/pkw-bergung-nach-vu-auf-a2/).
The fix for this is to specify “float: left;” in the css for the images.
So easy, but nowhere to be found…