I confirm Sam Bull's technique works: changing the "name" tag of the Python3.X (I'm experiencing the problem with the Python3.3.2 doc built from source with Sphinx) from "Python" to "Python3" solves this issue.
I confirm Sam Bull's technique works: changing the "name" tag of the Python3.X (I'm experiencing the problem with the Python3.3.2 doc built from source with Sphinx) from "Python" to "Python3" solves this issue.