Odd, I am not seeing this at all on Windows XP Pro SP2.
And I usually get hit with every little bug like that even when most others aren't!
Just out of curiosity, are any of you using any Stardock shell-altering applications? (E.g., WindowBlinds, WindowsFX, DesktopX, etc.) Whenever I have run into odd display issues disabling one or all of those has solved it.
Just a random thought...