http://docs.unity3d.com/ScriptReference/Quaternion-operator_multiply.html
The documentation on Quaternion's operator* says:

"Rotating by the product lhs * rhs is the same as applying the two rotations in sequence, rhs first and then rhs."

…So… the right-hand side first, followed by the right-hand side again?

Obviously this is wrong. I think the second one should be lhs, but please check it and fix the docs.