Follow the change of tensor3_rotation in fc3.c after the tag v0.9.0. This may induce bug.
Segmentation fault when fc3 is huge. The reason is not clear. To prepare a new clean numpy array and then to copy to it worked. This requires twice large memory space. In addition, for large fc3 case, memory leak-like behavior was found (numpy 1.8.1-ubuntu). Memory usage constantly increases during distributing fc3.