System Information
Win7 64bit
GTX 960

Blender Version
Broken: Blender 2.77.1
Worked: (optional)

Short description of error
I tried to create a sort of spiral by rotating an subdivided edge with "Proportional Editing" on. ( I got a blend file prepared and attached)
Rotating by hand/mouse works fine, but when I tried to type in the rotation angle per keyboard, e.g. 360° or 180°, it doesn't work so well.
Looks like the Rotation always tries to take the shortest way to it's end position. For 360° it seemingly doesn't move at all.
If I type in the rotation angle afterwards, in the tool options, in the lower left, it works fine again.
Only the keyboard input for the rotation angle seems to be buggy, somehow.

A similar problem exists when I try to rotate an object for animation, for example.
Then it's also not so easy to get it rotating in the right direction and for the wanted amount of degrees, sometimes, and the object also has the tendency to rotate the shortest way to it's "final location". But since here the path and direction of movement is what matters, this behaviour of shortening the path is somehow inadequate, I would say. To me, this seems to depend on the same rotatation-tool-weekness as the problem mentioned above.