Broken: latest master
Worked: 2.74 (only for extrude)
Short description of error
Some faces can't be inseted or extruded correctly using E or I
Exact steps for others to reproduce the error
Open attached file. bug inset extrude.blend
Hit E and move the mouse, nothing happens. Go to the T Panel and change the extrude Z value, it now works. (so only the modal mouse move are broken?). On 2.74, it works.
Or hit I and move the mouse, the Inset is completly weird. On 2.74, it doesn't work either.
Note that the scale is 0 on Z. But I never set this value to 0 and anyway, with a scale of 0, it shouldn't look like that? Nor shouldn't it extrude on Z in the T panel after calling extrude?
Very weird case, but real one.