Now that has to be the most concise error report ever I've searched the webmaster help forums and it seems that the cure is easy on Linux although may not work on a windows server. Let mw know if this didn't sort it:
My corporate IE. The front pages of both ARRSE and RR were what is best described as confused, and none of the drop down menus worked, I could only really see posts by finding if I could the last 50 button. This afflictin dod no affect any other sites I use. I do not see the problem at home.