I have a Latitude XT and the tablet buttons on the front of the monitor are not functioning. Within the QuickSet application the settings for the buttons are correct, but the buttons just won't respond. In fact, the button with the "key" icon and the manual screen rotating button don't show up in QuickSet at all. I am not sure if this is relevant but I have upgraded it to the Windows 7 release candidate for testing purposes.  Besides these buttons I have had no problems and within device manager no devices are missing drivers. Any thoughts?

Thanks