windows 7 64, nvidia 760
broken: blender-2.76-testbuild2-win64
worked: blender-2.75a-windows64
in the edge split modifier, changing the split angle, is going up and down in too small an increment,
also create a cube and rotate it in the tool shelf, with the rotate angle
same problem, rotation is in too small an increment, units degrees.
for example
30.01
30.02
30.03
blender 2.75a
30
31
32