Can be found here:
https://supportforums.motorola.com/thread/55402?start=0&tstart=30
The atrix phone, which "does everything", cannot play music without the sound micro-pausing.
The fix is in faux's kernel. The CPU isn't ramping up fast enough when there is a sudden large cpu load.
What is the #1 cause of random large CPU loads on the atrix? Motoblur. If you break motoblur by signing into a different phone, 95% of the random cpu spikes go away. You're not allowed to have two phones with the same account, so it disables the functionality on your old account. Except the phone seems to work perfectly fine without it. It also reboots a lot quicker with motoblur broke.
If you listen to music your phone will eventually randomly reboot
If Android kills the built in music player app when it is idle to conserve memory, it will go into a state where shuffle is stuck on and your playlist will be corrupted
Motorblur's big feature is that it keeps the state of phone saved.
Except it doesn't. I've gotten 6 phones and in my most recent restore, it was 6 months out of date. My home screen arrangement was old and wrong, and my sticky notes were out of date.
Oh yeah, Motorola doesn't actually test their phones with a working SIM card and motoblur account.
In fact motorola doesn't even turn their phones on for more than 15 seconds. A lot of refurbished phones get sent out with a defective screen that would had been caught if someone actually went to the set-up screen.
Also the hard reinstall only deletes the /data directory, so it will not fix a corrupt upgrade, OS installation, or user who dicked with their phone