I've been having an issue with burning DVDs on my first generation Mackbook Pro. I get the message that "the laser couldn't be calibrated for this type of media". I thought the problem might be in the media so I bought a different brand and still had the issue. Then I got another brand and still had the issue. I went from Imation to Verbatim to Sony. Then I realized they were all DVD+R. I tried DVD-R and it worked. Weren't Mac's supposed to burn DVD+R since the G4 Powerbooks came out? EDIT: I recall being able to burn DVD+R's but it's been hit and miss (10 coasters for each successful burn).