We would kindly ask you for a stripped down version of your application project in order to figure out what the problems is. We tested the QuickStart examples of radCombobox
with the latest version of WindowsBlinds and the Aries theme, but we could not reproduce the fault behavior - everything behaved as expected.
We would need more information to proceed further with our tests. Please, send us any additional information that you believe would be helpful, such as your WindowsBlinds version, Windows platform type (x32 or x64), the theme that you tested and possibly some screen shots. You can send us the files in a new support ticket.
Thanks in advance.