Thank you for taking the time to report this bug and helping to make Ubuntu better. I suggest you to check if you have the package "rhythmbox-ubuntuone-music-store" installed.
$ dpkg -l | grep ubuntuone-music-store -- Ubuntu One Store not showing https://bugs.launchpad.net/bugs/572381 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