virtualbox.org

My VMs have been randomly crashing lately. Running one from the console reveals the following upon crashing:

<unknown>: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.0.
Multiple segmentation faults occurred; can't display error dialog

Has anyone seen this message before?

I googled Fatal IO error 11 (Resource temporarily unavailable) on X server :0.0 and got ~5,000 hits. Some give interesting advice. The problem doesn't appear to be VBox specific.