Have u tried switching the camera between VCR mode and one of the camera modes and back again while the camera is connected to the PC? That's what seemed to work for me. Totally un-scientific I realize. I usually use a deck but I don't have a deck for the HDV format. It's been my experience that camera's can be very troublesome to work with as source devices. I'm primarily a Mac user so I'm not up on the 64 bit issue

I am having the exact same problem and am about to throw the computer AND camera out the window (except I am wondering if that might void the warranty)

I have had absolutely no problems with any of my cameras since I switched from NT Server to XP. Now that I have had to switch to Vista its just like the good ol' days.

It does seem like drivers need to be manually installed on vista. Its pretty bad when one of the most popular HD cams available won't work with the most used OS on the market! Heads need to roll!!!!!

All I can say is I didn't have to manually install drivers. the OS seemed to pick it up. Really strange but that's my story or experience as the case may be. Some strange combination of what I already described about switching etc...

I would like to know if someone stumbles on the same result

I did try switching back and forth. You're onto something with the HDV format; if I put my camera in SD and capture DV on Vegas it works!
LOL! I think those thoughts crossed my mind, as well... :)

If it works with DV and not HDV, start looking at the capture preferences in Vegas. It must be set for Mpeg2

That's it!!!
 

YOU ARE MY HERO. :D

Thanks so much, David.