This occasionally occurs on my old powerbook with the Sound menu option disappearing. A restart usually fixes it. Never happened with bluetooth though. Does a restart bring it back?
Mine is permanently like that (started as intermittent before failing completely). I am taking it in to an AASC the next time I'm traveling and let them handle it.
It's been doing it for a LONG TIME. Way before I upgraded to Lion.
I should have taken it to Apple when it was still under the 1 year warranty but it was my primary computer at the time and I work online so I could not be without.
I do everything myself anyways so I will most likely tear into it and replace whatever is broken.
Mine is permanently like that (started as intermittent before failing completely). I am taking it in to an AASC the next time I'm traveling and let them handle it.