Help..... I have new Griffin Technology iMic and as long as it is plugged into 'any' USB port my G4-450 AGP will not stay shut down. At first I thought is was a classic port contention issue - every USB device seems to want one of the two primary Mac ports. This is not the case because I finally gave the iMic one of the two primary ports. When I issue the 10.3.4 Shut Down command. the machine shuts down then after a few seconds it starts up again. The only way (other than pulling the power plug) I can get it to shut down is to remove the iMic. Any suggestions? Wonder what could be causing the RESTART. Dick