Crash on entering Dyntopo

I am crashing whenever I click the dynamic topology button in sculpt mode.
It is an instant crash with no error message, just click-Poof!
I am running Blender 2.69 on Linux Mint 16
(I also tried 2.66 and it had the same problem)

I just had cinnamon crash on trying to save a file, accessing damageā€¦

Have you tried pressing the button with the console visible next to the Blender window? Maybe something gets posted before the full crash.

I started working spontaneously again. I had rebooted and tried several more times, and then it went!
No idea what brought it on and what caused it to stop)