Hello there

If your Transflash/microSD memory card has bad sectors, then sometimes the multimedia stuff won't work.

The most notable problem, at least for me, is when you have iTunes playing your songs and suddenly there's no more sounds. That's the bad sectors kicking in. When you check your phone, you'll see that iTunes is still running and it's quickly going through your song list but it never plays one second of each song. When there are no more songs to go through, iTunes would still be there. The only sure fire way to get sounds again is by turning off and on the phone. But the problem is it will occur again. Just don't know when.

Additionally when this happens, you can't store photos and videos into the memory card. The phone thinks there's "insufficient storage space".

So anyway, I've found out that my memory card has bad sectors and most likely than not that's the cause.