Have you figured out the reason why your computer becomes unstable after having a disk in the drive?
I am having the same exact issue; after having disks in the DVD drive (PLEXTOR DVDR PX-800A:) they will not eject; I've tried using the eject command in the terminal, and using the "Open Superdrive" menu option.
I've also tried ejecting from Disk Utility but that will freeze the application. I can't force quit the Disk Utility application or even relaunch the Finder. The only way around is to go a hard reboot by holding down the power button.
Every time a disk is in the drive I have to force reboot, this is fast becoming a major issue, the computer works flawlessly otherwise.
I've read that it can be anything from bad RAM to a bad MB. Also, one last item to note, not sure if they're related but I tend to think so. When attempting to boot into the Hardware Test startup disk, the computer goes to the little wrist watch and never stops counting the minutes.
This will also occur when using the boot manager to select a start up disk even without the DVD in the drive, so its not limited to the DVD selection. The computer again needs to be rebooted and I have to select a startup disk from the startup preference pane. Of course the Hardware Test disk does not show as a startup option.
So, this is more than just an eject DVD issue, sounds more complicated than that. Also, just thought I'd mention the drive has been installed for over a year without issue, so its not due to a new piece of hardware.
Any suggestions would be greatly appreciated.
rslezak@mac.com