apt-cache show is showing you that gnome-shell is in both the "oneiric" repository (which is frozen when oneiric was released) and the "oneiric- updates" repository. Try running apt-cache policy gnome-shell to see which one is actually installed.
I don't have a powerpc machine so this is difficult for me to test but I believe it's working as the original bug reporter confirms. -- You received this bug notification because you are a member of Ubuntu PowerPC Architecture Team, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/903382 Title: [powerpc] Unsatisfiable dependency in oneiric To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/903382/+subscriptions -- Mailing list: https://launchpad.net/~ubuntu-powerpc Post to : ubuntu-powerpc@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-powerpc More help : https://help.launchpad.net/ListHelp
