After applying 6.0.30, and I did a rebuild of the database, I saw that twonkymedia only scanned 600+ of music media files, when I have more than 1000 of them.
upon closer look, I noticed all the musics scanned has english name folder . Those folder with chinese name are skipped totally. Is there a bug? Those musics in english name folder that has chinse character in the mp3 file name, are not skipped at all. so it looks like a folder problem?