If I have more than one playlist in the playlist directory and performs a total rescan there are to few entries in the genre_track table after the rescan.

I am running this with the mysql database, and verifies the result with the following SQL statements:
select distinct tracks.id from tracks where tracks.ct='flc';
select distinct genre_track.track from genre_track;

I tested with totally 2780 tracks and 3 playlists with about 200 tracks in each and after the initial full rescan 497 tracks are missing in genre_track.

If I run the same testcase with just a single playlist in the playlist directory everything works correctly and the two SQL statements above both return 2780 rows.

My library contains .flac files only and many of them contains several genres in the GENRE tag separated with ;.

The problem also exists in "6.2.2 (2006-01-07)" but seems to be solved in "6.5 (2006-01-06)".