for some reason, my ipad has issues syncing all of a sudden.. i try syncing, and everything works fine but it gets hung up on "step 5 of 5 - syncing photos"... it just stays on that for hours...
I'd start with unchecking the picture folder(s) you may have synced. Then it will skip that step. Once you've done that, start checking them one by one and syncing until you find the culprit.