Vertical scrollbar not appearing in Chrome, Safari and Opera...jquery UI issue?

Vertical scrollbar not appearing in Chrome, Safari and Opera...jquery UI issue?

Hi everyone,

I am trying to fix a bug where I have a dropdown list that enables a vertical scrollbar.  For the dropdownlist I am using http://code.drewwilson.com/entry/autosuggest-jquery-plugin for the auto suggest functionality. 

The problem is that when the dropdown list is rendered the scrollbar disappears if I attempt to click on it.  This happens only on Chrome, Opera and Safari, and I can only assume on IE, but I haven't tested for IE yet.   In Firefox there are no problems. There are no problems in Chrome, Opera and Safari if I use the mouse scroll wheel.

For the CSS I basically set the overflow-y property of the div to scroll. I am assuming that the bug is somewhere in the jquery UI.  Has anyone come across a similar issue and if so have you been able to repair it?  Thanks.