We have broken up RabbitVCS into several discrete parts for v0.13. This allows for more effective and simple packaging as we grow as a project, but has the side effect of making things somewhat more complicated for our users. RabbitVCS is broken up into two main chunks: The core back-end piece that is a python module, and the individual front-ends you use to access dialogs and actions. When installing RabbitVCS, you must now install the core package as well as a package for each front-end you wish to use. Or alternatively, add the PPA to your Ubuntu repository
See the README files in each tarball archive for installation information.
Discussion
If you are using Ubuntu 9.10, there is an easier way to add the testing PPA (will automatically handle key retrieval).
Add this line in System→Administration→Synaptic or System→Administration→Software Sources on the Other Software tab:
ppa:rabbitvcs/rabbitvcs-testing