Toggle large panel in IE causing content leaks out

Toggle large panel in IE causing content leaks out


Hi,
I tried to show/hide a large panel that contains a large amount of
div's and text in it using some animation effect (toggle('normal'),
slide('normal')). It all looks fine in FFox and other browsers, but in
IE, the content of the panel being animated leaks out of the panel and
stays on top very briefly and then hides away when the panel
completely collapsed. It doesn't look so obvious on smaller panels.
Using and CollapsiblePanelExtender of asp ajax toolkit had not
problems.
Any thoughts?
Eric