[ubuntu_studio] SuperCollider installation quest

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http://ubuntuforums.org – How to start my first-ever forum question? It's so intimidating! Well, that's as good a way as any, I suppose. For the life of me, I can't get the SuperCollider plugin to appear in gedit. When I use synaptic, everything loads well EXCEPT the supercollider-gedit option, which turns red when I click it ("Could not apply changes! Fix broken packages first.") I followed this fellow's suggestions: http://kijjaz.net/?p=174 and everything seemed to work fine, but still no gedit. (SC is not an option in "edit->preferences".) Also, unlike that person, I am running gedit 2.30.4 (Hardware)