I have been having close to the same problem except that I can’t get DV out in any software (Final Cut Studio, Motion, AfterEffects). I am running a dual 2gig G5, 6gig ram, ATI 800xt with 2 boot drives one with 10.3.9/QT 6.5.2 went up to 7.0.1 and then back down, FinalCut 4.5HD and the old studio software and AfterEffects. The other system is 10.4.1/QT 7.0.1, Final Cut 5 and the new studio software. Both versions of OSX are doing the same thing, no video or audio out to DV. It is wierd because as any of the programs are launching I can see the dv out grab for a second but then it drops again when the software finishes launching. Refresh A/V Devices will sometimes get me output for a second but if I move the mouse it drops again. I usually only get one chance to refresh then it stops having any effect. Any insights would be appreciated.