This also affects Xubuntu 8.04 x64. Installing the libgnomevfs2-extra (and it's dependency) and restarting Rhythmbox I was able to start the app without the error and subsequently remove them from the plugin list.
-- Unable to activate plugin Jamendo and Unable to activate plugin Magnatune Store https://bugs.launchpad.net/bugs/226493 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to rhythmbox in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs