The ticket is titled Slide Effects With IE6/IE7 Lists, and the
description is as follows:
slideUp, slideDown functions don't reveal/hide properly on lists in
IE6/IE7, while they work fine in other browsers (e.g. Firefox).
Applicable to list items (li) within unordered (ul) or ordered (ol)
lists.
Looking at the example I suspect that it's due to some sort of weird
styling/CSS issue in IE. I'll have to investigate more in order to determine
exactly what the set of circumstances is that causes the issue. I'll try to
check in on it again before 1.4 and provide a definitive answer one way or
