[b20] On Ubuntu defeat in orc ambush causing crush

[Postman]

After repeated crush-deaths I've managed to kill leader and exit by victory

[Graziel]

if your talking about Beta 20 not Beta 20b then its known bug, in announcements you have
"Sorry fellas, game breaking bug detected on b20 when dying in the ambush, so either do not die (heh) or update to beta20b (before picking up the staff)"

also in game main menu screen you have in info in bold: "UPDATE or it will crash at ambush!!!!!!!!!!!!!!!!!!!!!!!!!!11111!!1!1"(or something like that)