jQuery plugin: Treeview, bug in IE6 and IE7

jQuery plugin: Treeview, bug in IE6 and IE7

Hello
I use the plugin jQuery plugin: Treeview (http://bassistance.de/jquery-plugins/jquery-plugin-treeview/) it works fine under Chrome, IE8, Firefox, Opera etc ...
But there is a bug in IE6 and IE7 space below the green ball.
Screenshots :
In Chrome / Firefox / IE8 / Opera etc ... it's good : http://img265.imageshack.us/img265/8963/menuok.jpg
In IE6 and IE7 it's not good : http://img530.imageshack.us/img530/1698/menunotgood.jpg

My Website : www;mon5800.com

Would you or have it?


Thank you

Sorry for my english i'm French.