[NeoCZ]

I've just tried latest beta (2.2.3). For speed of testing I've removed two large collections from my library, so now it has about 1500 songs. Client was with empty database. I didn't get any popup asking for choosing right files and also any other error message. Sync ended with expected message, so for me this is a big improvement. Client seems to really get all files and db entries (MIDI, cropping, annotations, etc), so it seems like a big improvement of sync. Will try another tests during the weekend to see how it behaves with different settings and will also try merging two different databases. 

Oh, one sidenote: Overall status still seems to ignore file transfers. It just jump (after comparing songs in server/client databases)  to 100% before any file is sent to client so you don't have any clue how long it might take to finish the sync. I don't know how hard is to calculate this (only count files vs. count transfered data ) but IMHO it would be better to have some way to know (estimated) time to finish the sync job.