I have installed 2.003.4 firmware on my M3 player.
Since this version, I can play some *.WMA (encoded in 64KBps VBR) which didn't be played before.
But I have always one same problem, when I copy 6 Gb of *.WMA on my M3 player: the *.WMA, which are beyond the first 3.8 Gb of M3's flash memory, can't be played!

Why? The 2.003.4 firmware is not yet perfect...
Another thing is the 'Update Library'!

I'm tired to see the M3 do an update library each time after disconnected M3 from USB or pouch 'Hold' button. Especially if there are 6 Gb of music on my M3, it's very long to update each time!