Delete all, add measure, crash
From Chauncellor: http://musescore.org/en/node/2317#comment-5632
"It will crash with certainty when I delete all measures (control+a>del), append measures(control+shift+b>Enter) , and then hit the "N" key. Every crash I've been having has had either:
WARNING: Child process terminated by signal 6
WARNING: Child process terminated by signal 11.
It crashes when I hit the "N" key after deleting/creating new measures:
I made a short video demonstrating two crashes in succession: