Well ... nothing worked ... When doing a manual sync, it immediately says that the library has been synced. It takes a fraction of a second for the message to appear (I tired after turning off autosync). I'm not sure what I could reconfigure in options. this did not happen in version 19. Any new shows or track I add flawlessly syncs downstairs, but TV show covers is a culprit, although I didn't try changing covers elsewhere. When I installed 20, I had to re-import most of my TV covers. Maybe that shouldn't have happened and is related to the problem ...