DHTMLX Combo items not properly managed!

Suite and Optimus Suite 5
#1

I have used dhtmlx combo box successfully. But in IE-7, items of dhtmlx combo box not working properly. when I use scroll of browser in IE-7 item of combo box are splitting from drop down menu,

#2

Please, provide us demo to reproduce the issue
docs.dhtmlx.com/doku.php?id=othe … leted_demo