Uh-oh, big SNAFU!
DTb 1.1.0.6 can't load profiles created or modified by 1.2.0.8. I just verified it by installing DTb on my old XP laptop and moving profiles back and forth. DTb 1.2.0.8, however, can load profiles created by 1.1.0.6.
I've attached a .zip with 1.1.0.6 compatible ffmpeg and mencoder profiles. Drop the contents into your profiles directory. I can't do much for the AVIVO profile, because I don't have the AVIVO filters on my XP machine and the profile won't save without them.
Hopefully the next Vista build's profiles will be compatible with 1.1.0.6.