Long background story, but the short story is I attempted to set up a new TC stand alone and without an internet connection. Should work... but... The new TC does show up as a new WiFi Time capsule network and I can select it in Airport Utility 6.3.1. The utility does a few thing like checking the base station and then stalls with a spinning progress wheel. The utility eventually terminates in a "unknown error, try again message". Retried a couple times, reset the TC tried again still no love. For grins I opened old Airport Utility 5.6.1, selected the new TC, continued through all the warnings and set up the TC just fine. I go back to Airport Utility 6.3.1 and everyones happy (well except for the no internet connection status of course). I'm running with 10.8.4 on a MBP. TC is at version 7.7.1. I thought I'd share in case anyone runs across this.