Everything is fine in Firefox and Safari, but in IE 7 (and more than likely 6 as well), something in the left navigation coding is causing my top navigation menu to appear at the top left corner and snap back into place when moused over (see for yourself). And also, the drop down lists drop down behind content instead of overlapping it. But this is only in IE.

The URL is here:

http://130.39.232.221/union/

Any help is appreciated! I'm on a Mac and have limited Windows/IE access.

Would it be necessary to creat separate stylesheets for IE users?