Until we can come up with a permanent solution, ATI users should use this workaround. You need to extract it and launch the dk2_safemode.exe file from anywhere. It will also enable bilinear filtering and make software mode look a lot better.
Please send us a tech support ticket with a DXDiag.txt file if you're encountering this or any other issue, especially if you're getting the black screen glitch on NVidia graphics (still unconfirmed). It will help us investigate this issue further.
We sincerely apologize for the inconvenience and will keep you updated about our progress in this thread.