the problem might not lie with the elliptical itself, but rather with the type of person who chooses to use an elliptical. I know at my gym, folks who use the ellipticals seems to do all kinds of crazy things -- leaning on the handles too much, "riding" them backwards, spinning super-fast, doing them on their toes or heels, reading a magazine or watching television rather than focusing on form. and none of these folks seems to be the most fit either, so I might assume they're already pre-disposed to certain injury types. just a thought.