That you have one account where everything works ok suggests that it’s NOT a problem w/ the Mediabay, and rather that there is an issue with the user accounts in question.
I don’t mean to sound as if I’m not hearing you-- but have you actually reset the permissions, not just repaired them?
If not, I’d try using BatChmod. Just be careful!
It’s tough not knowing exactly what you’re running, computer-wise, and I’m sure you’ve already considered this-- but is the user account that works on the “remote” drive, or on the same drive as your system? Your solution is likely going to come from identifying any discrepancies between the working and non-working accounts.
Chewy