I would also check the video card's mfgr's. Web site, to see if there is a newer video driver available. Do not trust the OS, or any utility to tell you, if you have the latest version.
GUI issues are often driver related, and the Menus (also the Transitions) are heavily reliant on the video driver. You might not be having a GUI display issue, but whenever there is anything "odd" going on with the GUI, I look first at the video driver.