Would you have any suggestions about where else to ask about the PDI image shift?
I saw a thread that went into great detail about inaccurate aspect ratios. Did you know that different capture cards can render the captured the video into the frame at different widths even though it's all supposed to be the same? I.e, Cap card A may make the picture area of the VHS capture 704 pixels wide in the final avi, but Cap Card B might make the same picture area only 699 pixels wide (but all will still give a 720 wide image stream in the end of course). I found that a little shocking personally, but such "play" being possible makes sense when you think about it. Anyway, the reason I bring it up now is because they talk about how to fix your capture's width or height if either is too narrow or too wide. I'm thinking that maybe you (and I) can use this same adjusting tool to simply lower the captured image area within the frame.
After digging, I found the thread...
http://www.doom9.org/capture/capture_window.html
Toward the bottom they talk about making adjustments for bt878 cards which, luckily for us, the PDI Deluxe is a variety of.
Again, I haven't done this procedure yet, but it's on my to-do list. A pretty cool idea, wish I'd thought of it: burn a DVD with this test pattern then capture your DVD's player's output of this burned disk and see if it's wider or narrower or what. Neat!