I followed the instructions on Gutsy RC1 upgrade instruction page (for Kubuntu RC1). After I opened adept manager, I chose File > Manage Repositories. After a few seconds wait, I got the message:
software-properties crashed. Plus the above traceback... -- Adept Manager crashes when following official pre-release upgrade instructions https://bugs.launchpad.net/bugs/151896 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs