If you have an old version of the Matrox or Cirrus Logic graphical adaptor, the pull down menus in Rebel may be unreadable. You can fix this in the following way:
The Menu is now ok. Go again to the CONFIG menu and save the changes and problem is solved forever. Your Cirrus Logic or Matrox video card does not support a font of Rebel. So actually it's their bug we have to fix. Also you can find a bugfix for your Matrox card on the Internet at: