[Lizard]

It is a bug, not a cryptic error signal.
We're actually really puzzled by this particular bug. It's only showing up on a couple of our computers here.

If you're seeing this issue, please tell us (here or in an email):
1) What type of Mac you have (eg 2011 Macbook Air)
2) What graphics card you have in it
3) Do you have Xcode installed?