Ok, so here is a real update that might actually fix the resort of mp3.
There is also an added option to use fast sort (if speed is important remember to turn off all of the art downloding in config)
The fast sort feature is avalible for mp3 and flac. It only scans one file in each dir and sorts according to the info in that. This will speed up resort ALOT, especially if you turn off the art downloading.
To Download:
http://www.sendspace.com/file/0acglr