it seems that when the blind down effect is used on an element with padding it looks a bit awkward. It seems to blind down too far and then jumps back. It's a very subtle thing but is really annoying.
I don't have an online example but if you go to the demo on github and give the element a padding-top or bottom with firebug or something you'll see what I mean.
http://github.com/madrobby/scriptaculous/wiki/effect-blinddown
http://madrobby.github.io/scriptaculous/effect-blinddown/
Anybody found a way to stop it?
Still not resolved this but as I said in my comment, this issue can be worked around pretty easily.