May 24, 2010 4:56 AM

Rob,

This issue can be due to two reasons:

1. Due to peak feature(which is introduced in Win7) in Aero theme.

Check the issue by switching to custom theme.

2. By Chance did you remove or change the user32.dll.mui in the past couple of days? I know a lot of people are using a modified user32 file to remove the Evaluation watermark from the desktop.

If so I hope you backed up the original so you can revert.