My music files are on an externally powered 1TB hard disk.
After the latest update, library keeps crashing.
Often hard disk does not show-up at all even after a rescan.
On restart sometime detected and updates and again crashes after playback of a couple of songs.
Youtube does not take to login screen, so not able to use youtube plugin at all.
Reverted to version 2.657 and library problem totally solved.
Youtube though remains non-functional.