Rails spinoffs - Apr 2006 - Drag an drop bug in typo sidebar management, any help welcome

hi, i have discovered a bug under IE6 and the sidebar management of typo.

I have created a simplified version  available under
http://www.shoob.com/denis/sidebar_typo/sidebar.html
 
The code is also available locally
http://www.shoob.com/denis/sidebar_typo.zip

Every thing run fine under fifireox, safari and opera. We only have an 
error under IE 6.

i''m not able to find what cause the  error so i cannot propose a patch.

The Error is on the onHover method line 698 or 687
Sortable.options(oldParentNode) return null always the second time it is 
called.

so if you have any idea on how to correct this, contact me or  typoshere.org

Lamotte Denis