Ever since I updated to beta 3 and installed iTunes 10.5 beta 3 .. I haven't been able to complete a sync. It'll start off the steps 1-7 and it'll transfer purchases, sync contacts .. but then I always get this error message. And I've tried both the wifi sync AND the tethered sync via usb cord. Has anyone else had this problem? ... Here's a screen shot of what I always get ..