While building my application with jQuery I found out this really weird internet explorer bug: Applying SlideDown to elements that are relative positioned or that have relative positioned parents, some elements just disappears. This behaviour may be checked at http://www.arkilus.blogspot.com and a clean html at http://paste.lymas.com.br//?q=22246
Performing some tests i found out some actions that bring that elements back: - Edit ANY css property live with IE Devoloper Toolbar - Fade effects in any part of the page - While the slider is sliding up This is so far the weirdest IE bug I could notice.