Natty now has hkp://keyserver.ubuntu.com:80 in softwareproperties/ppa.py so I believe this is resolved. If not please reopen the bug report. Thanks in advance.
** Changed in: software-properties (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/516032 Title: add-apt-repository doesn't work behind a proxy -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs