I've had a Mini now for about a month. I have the Apple bluetooth keyboard and mouse, neither of which I've had a problem out of until now. Last night, I rebooted, and on startup, the Bluetooth Asssistant popped up saying it couldn't find my keyboard. I turned the keyboard off and turned it back on and the Assistant found it. So, worried, I rebooted again. Again, BA said there was no keyboard attached. Off/ON it worked. The following is everything I've checked/tried thus far:
Battery level is full.
After pairing, deleted the keyboard out of OSX and re-initialized it.
Had Disk Utility check the file structure and repair the permissions.
What else should I do?