In finder go to:
Application>>Utilities>>Disk Utility
Pick the drive that you want to verify/repair permissions and push the button
After thats completed give it a restart and tell me about it.
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Hi! I am also experiencing this problem! I came across this forum subject and tried the above suggestion, however it has not fixed my problem. I've been using my Samsung YP-U1 MP3 player & iMage webcam on my iBook G4 for at least 2 years now without problems until now!
3 things: I can still use my external Lacie HDD on both USB ports but I DO need to use a power adapter with this. Could power suddenly be an issue?
The second thing is that while using my HDD one day, straight out of the blue, it seemed to keep turning my computer completely off!! After a few restarts it's working o.k. After this happened however I lost my sound! ...again after a restart it was fine. (???) Then when I came to use my webcam it wouldn't recognize it and now my MP3 player too!! Frustrating or what!??
The third is that I have upgraded to OS X version 10.5 recently but this hasn't seemed to me to be the problem as I have had it running with all the above gizmos just fine.
So PLEASE if anyone can shine light on this I would be very grateful!!