Installing Virtualbox 4.1.6 on Solaris 11 Express hung my machine and even prevented it rebooting successfully. I suspect a faulty kernel module. Thankfully I have auto-snapshots running and could rollback my rpool after booting from the install cd.

This was a truly miserable experience as my Solaris-Fu is much weaker than my Linux-Fu.

• Boot from install dvd
• zfs rollback rpool@thismorning