What is the ubuntu-14-04-x64-do image?
It boots as Ubuntu 4.4.0-78.99~14.04.2-generic 4.4.62
Which is a more recent kernel than the ubuntu-14-04-x64 image's provided 3.13.
But I'm not sure how else it's tweaked (e.g. I found it was dpkg multiarch amd64/i386).
Is it supported? Should I even consider using it?