I am unable to sync my iPhone. The sync keeps on going and does not successfully complete.

I am using latest iTunes version.

The iPhone is USA week 39 model and was activated/jailbroken/unlocked on a PC running Windows XP SP2 using anysim unlock.

I switched to a Mac this month and have been able to sync the phone witjout any problems until last nite.

I have been getting insufficient disk space message for a couple of days now since installing iWorld. I uninstalled iWorld thinking that may have been the cause of the problem. It did not help.

What do I do now?