We have the same issue but to the moment we have made several tests.
System configuration:
Mac Pro 2010, dual Xeon, 24 GB RAM, Tangent Wave, Panasonic TX-PR65VT20, BT-3DL2550
Slot 4: Mac RAID
Slot 3: BM card
Slot 2: Quadro 4000 or nothing
Slot 1: ATI 5770 or Quadro 4000
What we have tested:
BM cards: Extreme 3D+ (2 cards), Intensity Pro
DaVinci: 7.0-8.1 full, 8.1 Lite
All configurations of equipment work well with Adobe Premier 5.5, FC 7 (Extreme 3D+) and BM native player (all BM cards) but BM cards do not work with DaVinci in our case. If we uninstall BM driver or BM card then Preferenses menu can be opened and configured. Otherwise attempt to open Preferences menu cause program crash. Same with clear installation of Mac OS and DaVinci only.
Regards,
Vladislav