Client does not start if server is dead

[jadudm]

Make sure the client always comes up, and reports to the user something sensible if the server is down.

[tomp]

I donwloaded Plumb this past weekend, but it won't start up. It runs for a minute or so and then exits with exit code 1 (according to the Console message.) Is that because of this issue? (I can't tell, myself, if the server is up or not.)