Blender Rigify strange issue with weighting I have a weird issue with Blender and Rigify.

I've followed this guide to create bones using Rigify and then apply automatic weighting http://cgi.tutsplus.com/tutorials/create-an-animation-walk-cycle-in-blender-using-rigify--cg-17812

It all seems to go great until I apply the automatic weighting and then I get the strangest result as the mesh seems to mostly disappear. I can replicate this each time I perform the whole process.

Any ideas or feedback? I'm stumped.
This is a common problem. Up in the top right you will see that it says Auto-run disabled. You have to press the button beside it that says reload trusted, and it should resolve your issue.