I just upgraded TeamtCity, and I'm having problem finding a compatible agent.
In y default agent Compatible Configuration tag, all my projects are displayed with the following problems:
Maven2Missing VCS plugins on agent:
Referring to Missing VCS Plugin on agent thread (http://devnet.jetbrains.net/message/5279437), I've tried to stop the agent, delete the plugins directory, restart, to n avail.
I've then reinstalled an agent from scratch, by downloading it from TeamCity itself, and got the exact same result.