>causes the thing to jump, apparently variously depending on where (on the bar) it is clicked and how big the bar is.
>
>Annoying, to say the least, as I usually do this to drag it and the code jumps. This causes re-eyeballing to re-caliberate the drag.

I haven't tried VFP8, but this bug is as old as the hills, going back as far as I can remember.