System Information
Operating system and graphics card
OS X Version 10.8.5
iMac 3.2 GHz Intel Core i3
4GB RAM
Graphic Card: ATI Radeon HD 5670 512 MB
Blender Version
Broken: 2.70
Pressing Tab (default Cube in Edit Mode), and then the ticking the 'Mesh Analysis' field in the N-Panel makes Blender crash
Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps