i have the same probleme with dv since years and years.
Wrote many time to bm and this forum, but never get a
I hoped with every new driver, that i would be solved.
But after years i gaved up.
Now, when i have DV-material i digitalize it
with a DVCam deck with SDI out.
I know, it don´t help you, but i can tell you,
you are not alone ;-)