Now Running 2269, I have about 61 playlists that I'm syncing to Spotify premium account. The playlists don't all sync over, first 75% sync fine but the remainder never copy over at all. It has the following symptoms:
1) Matching section works fine (with expected match errors)
2) about 75% through the syncing of the playlists it seems to hit issues and jumps to the end
3) it completes the sync with the expected "problem synchronizing the following item(s):
4) Match errors first, all good and expected, then the report first highlights "Spoitfy:_addTracks2Playlist error: 429

5) The all subsequent playlists have an entry marked "getUserInfo error: 429

The playlist that causes the failure is not the same every time.