I just bought Motorola headset that I use with Nokia 6600.
When I play MP3 files, in the headset I hear them in slow motion.
Everything else plays fine (amr, wav, etc).

Anyone had similar problem ????

ya i have the same problem with me 6600 bluetooth headset

ya i have the same problem with me 6600 bluetooth headset

I found the solution.
In MP3 software, under Settings it's an option "Bluetooth Headset".
So when you're using headset, you have to check that option.

It solved my problem.