During a routine deployment of a new version of FogBugz On Demand this evening, we encountered a bug that caused our web server to return an 'Invalid Server Name' error for about 3 minutes before services were restored.
We apologize for the blip, and are investigating to see if the error lies in the automated deployment script or in the internals of our web server.
As of now, all servers are back to normal and we do not foresee any other issues.