[Plugin: Nice Navigation] Expanding list overlays list on top of any otehr widgets below it

Hi,

First of all – awesome plugin… but I did come accross an issue. You can see it here, using IE:
http://komotion.com/test-nice-navigation-widget/

Expanding nested list overlays the widget with the one below it, instead of expanding its own area and have the widget below move down.

Looks fine in Firefox; issue is in IE.

Please advise,

Thanks!

http://wordpress.org/extend/plugins/nice-navigation/