Some of the time when I wake up my iMac (probably like 4th time or in a day) the Eject key won't work. I have to log off, then the Eject will work. Then when I log back in it's fine again. Any ideas?
Try to setup a new account and test it on that one. When you got your "results" you can delete it. At least this will prove, if it's a prob with your settings (which are default on a new useraccount). Tried repairing permissions?