Safe sleep not so safe on unsupported machines?

More evidence that one should always be cautious with hacks: according to this Accelerate Your Macintosh! reader report, using the PatchSleep utility to enable safe-sleep on Matthew's 12-inch 867Mhz PowerBook resulted in overheating and ultimately fan failure on the machine.

Matthew concludes his note of warning, saying, "So, the moral is – be careful with hacks to run software on unsupported hardware. I don't know what the outcome would have been if I hadn't noticed the problem, but it could have been a disaster."