Apple today released an update for the Mac Pro EFI Firmware (1.8MB);
This EFI Firmware Update fixes several Boot Camp and start up issues on Mac Pro computers.
After this update has completed successfully, your Boot ROM Version will be: MP11.005C.B01
An update was also released for the SMC Firmware on the Mac Pro (Under 1MB):
The SMC Firmware Update adjusts fan behavior in the Mac Pro.
After this update has completed successfully, your SMC Version will be: 1.7f8.