I have not yet turned Growl back on, but Growl was not the problem. I took the iMac G5 into the Genius Bar last Saturday night (yes, I’m that much fun), for the second trip in three days.
Good news, though, was that I left the computer there that night, and had it back, free of charge, with a brand-new power supply on Monday night. All is well once again, and my computer wakes and sleeps easier than I do once more. The Genius Bar experience was quite good all the way through, especially with the availability of online appointment scheduling. I didn’t want to be there, but all three visits were quick, and I got competent helpful people, at no charge. That is ever more rare, so it is notable.