I'm also seeing this issue still. Versions I have of the packages mentioned above are:
software-center 5.0.2ubuntu0.1 python-piston-mini-client 0.6+bzr48-0ubuntu1
Just in case (from reading other related bugs) my proxy does NOT need authentication.
I'm also seeing this issue still. Versions I have of the packages mentioned above are:
software-center 5.0.2ubuntu0.1 piston- mini-client 0.6+bzr48-0ubuntu1
python-
Just in case (from reading other related bugs) my proxy does NOT need authentication.