Has anyone found a solution to this problem: http://groups.google.com/group/jquery-en/browse_thread/thread/a9f3fbb7d4c036f1/de2009dcbe51dd91?lnk=gst&q=slidedown+jumps#de2009dcbe51dd91
jonhobbs set up a great test page here: http://83.138.132.232/test.htm It uses 1.2.6, but I'm getting the exact same effect with version 1.3.1 slideUp works fine, but slideDown with an unspecified height produces the jump of about half the elements actual height. Thanks for your time.
