With 3.8.0-28-generic stopping a container (at least if there under a minute or so it was started) will crash the kernel.
To repeat
Make sure you have that kernel (release kernel works fine) - its in the raring-proposed.
Create a container (with ubuntu template)
Start it
Stop it
Sometimes it will stop the container, but the kernel will crash if you start the container again.
With 3.8.0-28-generic stopping a container (at least if there under a minute or so it was started) will crash the kernel.
To repeat
Make sure you have that kernel (release kernel works fine) - its in the raring-proposed.
Create a container (with ubuntu template)
Start it
Stop it
Sometimes it will stop the container, but the kernel will crash if you start the container again.