I just got back to playing with Bluetooth this weekend. Starting from the latest Raspian download, I did an apt-get update and upgrade. I was getting some kernal 'oops'es and 'not tainted' messages which sounded familiar, so I did a sudo rpi-update, and ended up with this:
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[email protected] ~ $ uname -a
Linux raspberry-office 3.12.19+ #684 PREEMPT Fri May 16 19:27:32 BST 2014 armv6l GNU/Linux
[email protected] ~ $ /opt/vc/bin/vcgencmd version
May 16 2014 18:49:37
Copyright (c) 2012 Broadcom
version 3a67cfadce4d248b764d06dea2291917bc5db802 (clean) (release)
Things have been surprisingly stable since then; I've been streaming music from my phone all weekend. Using a CSR 4.0 dongle.
You didn't give us much to go on, so it's hard to say if the firmware is your problem. For starters,
what BT dongle are you using, and
(sorry, you did mention that) what are the results of 'hciconfig -a'? If the status is 'UP RUNNING PSCAN', you should be good to go, tho I'm not familiar with the GUI Bluetooth Manager. If status is 'DOWN' check for messages using 'dmesg'.
Oh, and please don't double-post. It just makes things confusing for everybody.