I have had my iPhone for almost a year and have had no issues until about 2 weeks ago. Now every time I connect to my desktop to sync, iTunes freezes up mid way through the sync, and an "Adding Files" window pops up stating that it is "Processing 20100718 204803.m4a". At this point the sync will not complete and I have to shut iTunes down. I have searched, found and deleted this file, but it will reappear and cause the same issue. I have also uninstalled and then re-installed iTunes but the problem persists. Any thoughts?