I fixed my IE side bar width Issues and you can too

http://www.positioniseverything.net/explorer/expandingboxbug.html

This site is an absolute gem. To all of you (and I know there are many) who are having IE 6 shove your sidebar to the bottom, and start it after you content div ends, this should fix it.

under the #content section in the css add:

overflow: hidden;

This will cut off or hide the “imaginary” content that IE seems to add to the width.

The issue is in IE for some reason:
width of content + sidebar > width of wrapper

This should fix it.

Hope it helps ya.