XF86 configuration wrong
The refresh rate problem is probably the result of not having your monitor settings configured properly. There is no difference between refresh rates in stereo and out of stereo, from what I know. The guy probably just needs to edit his the monitor definition in the /etc/X11/XF86Config (or wherever it may be on his system) file. In the section that defines the monitor settings, he should enter the proper horizontal and vertical refresh rate ranges to reflect the values that his monitor can do. The user's manual for the monitor will list these ranges, and once he puts those into the file, X should default to the highest refresh rate possible for whatever resolution he is running.