Thanks Hal. It was right in front of me and I never noticed it. Now, it doesn't appear in the Creat Disc room which (if I understand this correctly) combines the production (project rendering) and disc authoring in one place. Wouldn't you expect to see it there? Does that suggest that to make sure that hardware acceleration is turned off that we should always Produce first then Create Disc, bringing in the rendered file to be authored?
FYI, I'm dwelling on this because I "Produced" a DVD (highest quality) from AVCHD files and was pretty disappointed with the quality (even as a DVD; I know the expected quality loss from AVCHD to DVD). The PD9 DVD was significantly less quality than a DVD I made by a direct copy from my camcorder to a set-top DVD player/burner. If hardware acceleration is the culprit then I want to make sure it is turned off. My computer is strong enough without it.
HP Pavilion Elite 410f. AMD Phenom II 1045T (six core), ATI Radeon HD 5570 Graphics Card w/1GB, 8GB memory, terabyte HD, generic multi optical, LG BD burner, both Lightscribe, Windows 7 Home Premium 64 bit. Formerly used Ulead/Corel VideoStudio.