"iPhone disconnected" error at sync!

Is your iPhone connected to a USB port on your computer - not connected to a USB hub, or to an available USB port on your keyboard or monitor?

Are you connecting the iPhone directly to a USB port on the back of your computer? If not (if you are using a hub or the USB port on a plastic keyboard) this is most likely the problem.

That file is somewhere on your computer or iTunes would not have had a problem with it. Turn off automatic syncing in iTunes (Preferences/Syncing), put the iPhone in the dock. When it is recognized click on it in the list, then the photos tab. uncheck sync photos, then try to sync. If it works then it is definitely a bad p[hoto file. Note the directory name in the photo tab; the problem is in that directory or a subdirectory.

I had a what sounds like a similar problem with a refurbished iPhone I bought thru AT&T. I called Apple Support and a very nice woman helped solve the problem immediately. If I remember the steps correctly, she had me open iSync and then click on Reset Sync HIstory. There were some options that I don't remember, but basically you clear the history. Then I plugged in the iPhone again and it no longer gave me the 'disconnected' message. Instead, it said there were a number of conflicts between the iPhone and Addressbook, and I needed to choose which data to use. I chose Addressbook and it immediately synced with the iPhone. No problems ever since. I hope this solves your problem.

Another option is to check the 'Replace Information - Contacts' box under the 'Info' tab when you attempt to synch. That has corrected the problem for me.

Glad it worked. That's what these forums are for.