I had an odd problem I wanted to share in case anybody else has this. I'm on the 06/08 build.
Yesterday, everything was working fine. This morning I woke up (phone was charging all night) and I found:
Notifications sounds were not playing, actually, any "media" sounds were not playing.
Bluetooth would not turn on.
I tried the usual... reboot... power off... hard power off... nothing helped...
I then went into Safestrap and wiped cache and dalvik... and everything worked after that. So if you see any odd problems like that, try the cache/dalvik wipe.
Had this happen to me all the time on Rc3. Not sure about Bluetooth as I never use it. But it's very irritating none the less, not having that particular problem on RC5