I have the same problem, I have the nexus 10, and the accelerometer works randomly turning to the right (I think)
The GPS status app says that the accelerometer goes to D15 or more. But after a little stabilizes, but when I try to take a photosphere the grid on the floor starts to turn to the right and then I cannot take a photosphere...
I've already tried to calibrate but I don't see a change...
Do I have a broken accelerometer?
Note: the tablet works fine changing from portrait mode to landscape and vice-versa