I know this is a common complaint. I, myself, don't have bt headphones, but being a true blackberry addict, doesn't stop me from finding a solution. So what we know is the last known working copy was .75. Could you possibly pull the net_rim_bluetooth.cod out of the .75 Os and overwrite it into a beta? I'm assuming that this cod would hold all the bt profiles. Kinda using the same principles as the mms overwrite.