Today, my iPhone 2G stopped syncing to my Core 2 Duo 2.4 GHz iMac (OS X 10.4.11). The USB cord was placed in a different port with no response. Then I grabbed working USB cord plugged into an AC outlet. When plugged into the iMac, zilch. The confirmation ring was heard when using the car charger. By now I established it's not the cord or the iPhone. Still, I restarted the iPhone and restarted the iMac. Then I unsuccessfully plugging the USB cord into the desktop iPhone stand. Has anyone ever experienced non responsive syncing or know how to rectify it? Clue: Yesterday I upgraded my Canon MX850 driver. There's no Uninstaller. Perhaps I can reinstall from the original discs if someone thinks it is applicable.