Originally Posted by Browning
Did you use the Disk Utility on the Mac to burn the ISO? That's how I've done it the last two times (2010 and 2011) without issue. Also, I've had the best luck with DVD+R's so I highly recommend them!
Yea I think switching to a +R did it for me. Although, I burned the 2009 disc just fine on the same (batch of DVDs) Verbatim DVD-R I tried using to burn the 2011 version.
But who knows?