Comment 1 for bug 1452115

I should also add that python3.4 (3.4.0-2ubuntu1 ; /usr/bin/python3.4) also has the same issue. And this was only tested under 14.04 (I would assume that it also affects every other currently supported version, but don't have the space for VMs to check :( , sorry).

Sorry about the lack of that info upfront.