Yea, my experience with the progress bar was also just as you describe. I went back on the VD website again this morning, and noticed something that said...I didn't read it too carerfully, but something to the extent that their filters should be used through something called the Virtual Dub filter management program, or something to that extent. Well, I've never heard of that before, and as I said, all my other VD filters (about three) work just fine. Just have to assume that this one simply doesn't work.
I found two others on the website. One is called Dynamic Noise Reduction 2.1 which behaves just like vdn2 (doesn't work), and one called Smart Smoother which does work, but I can't really understand what it does, or see much change. Ahh well.
Nat, do you know of any others?