Which older drivers did you use Chromatik? I've had this exact same problem. RMA'd my BFG GTX 280 OC. The new card arrived today and I was planning on putting it in after work. (Thanks for the help with my RMA by the way Jeff.) This was before I found these threads talking about the 191.07...
I'm starting to get a little frustrated with BFG myself. They've had my GTX 280 OC with purple/pink screen of death syndrome sitting in their Quebec warehouse for a week now.