I was a t a customer site and was presented with an interesting question.
He had Cisco Stackable Non-POE switches in his closets and also was planning to use the RPS to provide redundancy in his closets. He found that if the power went out, the switches indead did fail over to the RPS. But the problem was that when the power came back on, the switches did not fail back to normal power without a reboot of the switch.
He has had the switches for a while so I am not sure what version of code he is on. Is this a known bug and has it been fixed?