I just tried to duplicate it on my
iMac 1GHz PowerPC G4
Flat panel
OS Tiger 10.4
512 MB DDR SDRAM
GeForce4 MX
VRAM 32 MB
and...it woiks just fine, I had Safari open, Mail running, Word 2004 running, TextEdit running, iTunes, and the dock mag works like a champ.
Good luck.
Paul