When they originally reported the issue they had IE7. While troubleshooting we had them upgrade to IE8 and the problem persisted. Unfortunately I don't have a real windows XP machine to test on the example page. The best I can do is a VPC and I can't recreate the problem on the VPC.

 

I have PMed you a link to the .aspx page. This is a live page in the system of the customer who is reporting the problem.