When I try to upgrade my 12.10 install to 13.04 via do-release-upgrade, I get the error:
File "/usr/bin/do-release-upgrade", line 145, in <module> fetcher.run_options += ["--mode=%s" % options.mode, AttributeError: type object 'DistUpgradeFetcherCore' has no attribute 'run_options'
When upgrading from GTK, the update-manager quits after informing about the new upgrade. This seems to be common as I've seen at least three threads on AskUbuntu about this error. Any help?