X2 Crash Exception

I remember there being some form of "crash protection" in Sonar; if it was crashing, it would ask if you would like to try to save your work.  This feature is still mentioned in the X2 Reference Manual, but I haven't seen it once in X2--and there have been a number of crashes at various points, though they seem to be less frequent than they were at first.

Maybe I've forgotten; is there a setting that enables/disables this or is it just supposed to happen, because if it's supposed to be automatic, it isn't working.