Code review comment for lp:~thumper/unity/regional-damage-sru

Tested Unit 6.0 and Nux 3.0 again. They now crash in the same way on nvidia. So it's nothing to do with this branch.

I also upgraded nvidia 295.40 to 295.49 but no difference (other than the stack traces are now completely unreadable).

I suspect the nvidia problem could be related to bug 982485 or bug 980298. When run under valgrind, I get a rubbish stack, but it happens immediately after bug 988880, which might be relevant.

Anyway, this branch seems good but I can't test it on nvidia-current/nvidia-current-updates.