**System Information**
Windows 7 64-bit
AMD FX8350
Asus Sabertooth 990fx
Gigabyte Windforce 7970 GHz Edition
**Blender Version**
Broken: 2.71.3 Hash: 5c3c3ab
Worked: 2.71.1
**Short description of error**
When using CTRL-Z to step back with the Graph Editor displayed, I get frequent crashes. It's usually immediate.
**Exact steps for others to reproduce the error**
I've been trying my damndest to recreate this with a simple scene, but have thus far failed. I'm able to reproduce it with such reliability in my (large) scene that I wanted to put the word out.