Considering how big of a mess the 9.0 upgrade was on channels, should we wait out the 9.1 upgrade or has it already been more properly vetted for channels support?
FWIW I read on the NVIDIA forums that people are having issues with volume control, etc after the 9.1 update so I'll be staying on 9.0.2 for a bit 
I read some reports on reddit about CEC not working correctly after upgrade.