I have tried using a different 10.6.3 installation on my machine and this time the debug version loads just fine.. So I must have an issue with my other installation, sorry about that
So using the other installation, I have taken a screenshot of my kernel.log before and after sleep to show the debug feedback, though there aren't any further message from VoodooPowerMini after wake from sleep.
Then I show a screenshot of the steps I use to unload and reload the kext, followed by another kernel log of the debug feedback.
Hope this gives you something to go on, or if there is more information that I can supply then just let me know.