Where this is expressed in your code:
P&R Infrared is a division of
I think you have a missing <p> tag.
The Validtator also suggests a missing closing tag but if you fix the <p> tag thing that one might go away.
It might not be your problem, but you should fix it as it isn't going to help any either!
I fixed the missing <p> tag and now the page validates perfectly. Still having the issue though, it appears it's only in IE6 actually.
Nevermind, I fixed it. Looks like all I had to do was float one of the divs and that took care of the IE6 issue.
Well done Chris...
 Perhaps you should mark this as answered?