It seems that some people do not have the problem and are under the impression that it's the general "touchiness" of the LCD touchscreen that is being discussed. Here's two examples of the "jump":

1) I'm scrolling through some 200-odd ebooks in the Library, get to the one I want to read, stop and lift my thumb that was scrolling the screen on the right side, tap the desired ebook with my stylus, and instead of being selected the ebook list "jumps" half a dozen places or more up or down. Sometimes completely off the visual display so I need to scroll to it again.

2) Drawing a Japanese kanji character in aedict's kanjipad full-screen handwriting recognition pad. I get to the ninth stroke of fourteen and suddenly a line shoots out from the tip of my stylus to the bottom of the screen, requiring me to clear and start over.

Things like that.