I solved the problem and tested it on my system. The upgrade to a development release now works fine.
I use urllib2 to test the repository url insted of using httplib and ftplib, so the proxy definitions are used. The code is more compact too. Can someone have a look? ** Attachment added: "unified diff for /usr/lib/python2.6/dist-packages/UpdateManager/Core/utils.py" http://launchpadlibrarian.net/32630844/url_downloadable.patch -- url_downloadable does not respect proxy https://bugs.launchpad.net/bugs/396187 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs