This is a universal problem. It occurs with all the newest ATI cards. Their most recent driver update contained poor OpenGL support, which is an improvement from zero support. As Slip said, this problem is for 3.8 and newer. You'll just have to wait for another catalyst update.
Omega drivers aren't windows 7 compatible, and aren't meant for 5xxx series, you want to try using the command '/opt chatcache 1' in game, if that doesn't work, then you're screwed, sorry :x.
Hey, hey, hey. Just as ordered! Catalyst 10.7 was released a few moments ago. Try that and inform us about the ghost issue. If this fixes it, then praised be ATI!
EDIT: Yep. Tested and approved. Catalyst 10.7 fixed it, so now Toribash works great with 58** cards as well!