I had a problem with my MacBook Pro repeatedly unmounting and remounting SD cards.
Fixing permissions and restarting didn't help.
Rebooting once into Safe Mode (shut down, power up and press and hold Shift after the chime) fixed it.
Just in case anyone out there runs into the same problem, they can find the solution here. I couldn't find anything on the Internet that referred to this issue.
[crarko adds: This would likely indicate that there was some incompatible driver cached. Booting in Safe Mode probably forced the cache to be rebuilt, eliminating the conflict. I've seen this kind of thing with drivers before, but not for a long time, maybe in Tiger.]
Fixing permissions and restarting didn't help.
Rebooting once into Safe Mode (shut down, power up and press and hold Shift after the chime) fixed it.
Just in case anyone out there runs into the same problem, they can find the solution here. I couldn't find anything on the Internet that referred to this issue.
[crarko adds: This would likely indicate that there was some incompatible driver cached. Booting in Safe Mode probably forced the cache to be rebuilt, eliminating the conflict. I've seen this kind of thing with drivers before, but not for a long time, maybe in Tiger.]
