I will be working normally and then open up a sketch to edit a dimension and the font size has gone from the 12 point that I always specify to 1.50874653 inches, what really baffles me is that the number is constantly different and this happens 2-3 times a day in a a 6 hour workday... 

Anyone else?  Any Ideas - this is the worst thing I have to deal with, its not so bad..

I have AT fireGL5200

WInXP pro

AMD 6400+ dual core 3.2mhz

4 gigs corsair ram

latest drivers for the gl5200