I've read some of the similar threads on this issue, but I fear I may have transcended the issue to a new plane of pain in the neck... I've got a 17" Pbook 1.5 GHz, and I've got the same disappearing problem that's been seen in other threads. http://forums.macrumors.com/showthread.php?t=204737 (Pictures and stuff documenting the problem here, too.) Anyway, I've run permissions check, rebooted, fsck, zapped pram, and the rest of the basic troubleshooters that I could think of. What kills me is that the System Profiler still gives me a Bluetooth tab under Hardware ("no information provided", of course). What kills me yet further is booting on my backup drive (which is mostly clean) also gives me no PreferencePane for Bluetooth. Am I right to believe that if the tab still exists in Profiler that I don't have a hardware meltdown? Is there a solution that won't cost me up the river from AppleCare since I don't have any protection plan remaining? If it helps answer a question I might get, the software version installed for my Bluetooth PrefPane is 1.7.5, according to Profiler. So...any ideas?