Hello, Maybe this has everything to do with implementation and is not a fault of jQuery but I've always wondered why animations (like slideDown) do not finish smoothly.
Case in point: http://leandrovieira.com/projects/jquery/lightbox/ The animation is smooth until the very end where it jumps to completion, skipping several "frames" of motion. Why is that? I've noticed it in my own basic animations too. Thanks, Chris.