I have spent 7 hours on CHAT and phone calls with both QBT and QBD, only to be hung up on by Tier II support at QBD.  I am having the same exact issue with Syncing as others are having.  I tried clearing the path and re-connecting, but it fails.  

QB support (Simon?), you sound like you care, but why are so many people having to deal with the same issue, yet support at both QBT and QBD seem to be unaware and unable (or unwilling) to assist??