Check http://blogs.msdn.com/calvin_hsia/archive/2007/04/26/foxpro-menu-items-combo-boxes-not-refreshing-selected-item-under-aero-in-vista.aspx
It may be fixed in SP2 but I don't have Vista to test.

>
>When I click on my form drop down in window Vista and move the mouse pointer down the list it highlight's every selection it touches? The selection still works ok, it just looks strange? Is there a fix for this???
>
>Thank you for any help Mark Phillips