Apple has released two software updates for the Mac Pro, the EFI Firmware Update 1.0 and the Mac Pro SMC Firmware Update.
The 1.8MB EFI Firmware Update fixes several Boot Camp and start-up issues on Mac Pros. After it has beem successfully installed, the Mac's Boot ROM Version will be: MP11.005C.B01. The download is available here.
The under 1MB System Management Controller (SMC) Firmware Update adjusts fan behaviour in the Mac Pro, improving the machine's thermal management.
The company also released an update to restore the firmware of an Intel-based iMac (early & mid 2006), Mac mini (early 2006), MacBook Pro (early 2006), MacBook (early 2006), or Mac Pro (mid 2006) to original factory condition.