r247095 Boot Failure

I'm on r247095. My box is failing to boot on a Dell Precision T7500. I'm
running ZFS as root with a mirrored root pool.

Here's a pic of the box failing:
https://lh5.googleusercontent.com/-Lq_jlX8of0o/USY4cqZ5BOI/AAAAAAAAGoI/Nd1LGPbFjHc/s1112/IMG_20130221_100723.jpg

There isn't much useful information in the pic. No crash dump is generated.
Where do I go from here?

I can boot into kernel.old and that works as a workaround for now.

Thanks,

Shawn