-I can create a DVD single layer ISO file and a folder set. I have not tried to burn a single layer DVD, because I have not needed to, since installing Creator 2012.
-I cannot create a DVD dual layer ISO file, folder set or DVD.
-I am using the same pc, burner and discs that I used with Creator 2011.
-I ran driver updates for the burner and the ATI card.
I need to call it an evening, since I have a day-long class tomorrow. I will get back on this as soon as possible. I have sent an email to Roxio tech support, but I don't expect much.