Over the past few weeks, shortly before 2.7 and during 2.7, I've been having trouble with various hotkeys and mouse controls.
- LMB will not grab a transform axis to manipulate objects, but it will only relocate the 3D Cursor.
- Numpad controls go from changing view to switching layers.
- Many other controls, such as Ctrl+ and Ctrl- for growing and shrinking selections, refuse to work or work differently unless I press or hold the Esc key first.
The interesting thing is that this doesn't happen constantly. When I start a session of modeling, controls work normally, but at some random point during the session the controls will flip over to what I described above.