Aspen TruVu video jerkiness

[CogoSWSDS]

Hi all,
I have an Aspen TruVu video capture board. It uses a Zoran chipset, according to VirtualDub. I've posted here before about successfully making VCDs using this board but lately I've tried capturing video from VHS that has some panning in it and I notice that when the video pans the panning is jerky in the .avi file. VirtualDub doesn't report dropped frames if I check the "Round to the nearest millisecond" but does report some dropped frames if I don't check that box and cap at 29.97fps (I live in the NTSC world), but nothing too drastic - maybe 1 frame every 20 seconds or so. Any ideas, as this seems to be a capture problem not an encoding problem. I notice the jerkiness whether I use windows MP or Virtual dub to preview it, and of course the jerkiness is still there after encoding to .mpg, so I know its not a case of my drive not keeping up on playback.

Thanks,
CogoSWSDS

[CogoSWSDS]

I suppose I should also mention that I'm capturing to the system drive (Windows 98SE) and not a separate drive. Would this have anything to do with it? Am hoping to be able to purchase a new HD soon which I can dedicate to video capture.

CogoswSDS