My upgrade to ICS a couple days ago went fine and I had no problems until last night when I rebooted my phone - just cuz - and then found that the only way BT now plays without stuttering is if I turn off wifi. No problem with 3G/4G, just wifi. I've removed and added both BT devices, rebooted the device again, and it makes no difference. Also stopped Bluetooth Share, cleared data - no change.
I can make a smart action to disable wifi when I turn on BT but that's got obvious drawbacks. I'm contemplating a factory reset but hate to do that if I don't need to.
Anyone else have this?