Comment 7 for bug 506981

I second the idea of adding the quotes to the username. The present warning makes very little sense to the person unfamiliar with Linux, like me.

Please login as the "ubuntu" user rather than "root" user.
I spend a good half an hour trying to find what should I do to login to the system.

I'm sure it affects many people as Amazon Console currently says to login as "root" user after launching Ubuntu instance.