So this morning every single VirtualBox VM refuses to load. Ever-so-helpful "there was an error" messages. I'm assuming I'm looking at a driver, libc, or similar failure from the dist-upgrade of the host this morning. Yay. This is *not* what I needed to work on this morning.

[Update] a workstation/server reboot (Egads! this is Linux, what is this world coming too?) was required to get it back up, possibly a kernel-module incompatibility.