I've just installed Meteor 1.0 on my Ubuntu 12.04 VM in VirtualBox. After login via SSH from my OS X host and trying out the Meteor tutorial at https://www.meteor.com/try I get this exit code 100 from Mongo when I launch the example.
Here's the weird part, I only see this exit code 100 when I'm using OS X's terminal to SSH. If I try using putty on Windows or Chrome Secure Shell in my Chrome browser there is no problem. The Meteor app launches ok!
Is OS X's terminal/SSH implementation any different from putty or Chrome Secure Shell?