i had the same problem, and i found a stupid way to get rid of it. this is the trick: go to preferences, then cd and dvd preferences, and it will probably say "when you insert a blank cd or dvd- and it sais "ask what to do". well, the trick is to put "ignore" and then close preferences, and now go back to preferences, and change it back to "ask what to do". and thats it. seems to me that its a small operating system glitch that does not recognise the "ask what to do" option, just reset it the way i told you, and everything wil be fine.