You might try this, although part of the problem was somewhat unrelated:
http://boards.ancestry.com/topics.software.famtreemaker/9537...
basically [if that link doesn't work] the person made a new tree in FTM of just one person, merged that into the "regular" tree and foooled ftm into syncing again.
http://boards.ancestry.com/topics.software.famtreemaker/9537...
basically [if that link doesn't work] the person made a new tree in FTM of just one person, merged that into the "regular" tree and foooled ftm into syncing again.