I get the following error: nVidia OpenGL driver: Driver component mismatch

This means that your video driver is out of date. Fix this problem by going tohttp://nvidia.com/content/drivers/drivers.asp and downloading the most recent driver for your video card. Usually, Fledermaus benefits from having a recent driver for any brand of video card. 
 

If you use a Dell computer you can also go to the Dell website, http://support.dell.com, to find an updated driver.