I have a bit of an odd problem, it looks like theres a program / application window that didn't close properly. The left has like a glitched graphic or something.
Appears after restarts, and after reloading shell.
I just finished upgrading from Windows 7 Beta from a USB installation. I installed a few programs and thought it would go away. It didn't. Here it is:
So, you were seeing it in the beta, and now your seeing it again in the RC - is that right? Yeah, I like the idea of the wallpaper change. You might also want to look at graphics drivers, that could help.