Hi. I'm having issues in IE6-7 with the Nested Side Bar Menu. I can't figure out what I've done wrong. WOuld love some help or thoughts on how to correct.

http://www.burntpine-travel.com

Client keeps having gaps in between the categories that fly out from the menu. Whenever there are 3 or more groupings, the last one is spaced out and not accessible. Any thoughts on where I went wrong?

Thank you!