During ground battle, during the firing of the machine gun, the game suddenly crashed with following error report fron Mac console and no inside game error message.
10/09/11 10:17:00 [0x0-0x1a01a].net.sourceforge.UFOAI[187] ******************** Notice com.apple.console
10/09/11 10:17:00 [0x0-0x1a01a].net.sourceforge.UFOAI[187] ERROR: LE_NotFoundError: Could not get LE with entnum -455 (src/client/battlescape/events/event/actor/e_event_actorshoot.c:164) Notice com.apple.console
10/09/11 10:17:00 [0x0-0x1a01a].net.sourceforge.UFOAI[187] ******************** Notice com.apple.console
10/09/11 10:17:12 [0x0-0x1a01a].net.sourceforge.UFOAI[187] Error: Mem_Free: bad memory header top sentinel [buffer underflow] Notice com.apple.console
10/09/11 10:17:12 [0x0-0x1a01a].net.sourceforge.UFOAI[187] free: src/common/dbuffer.c:#98 Notice com.apple.console
10/09/11 10:17:12 com.apple.launchd.peruser.501[87] ([0x0-0x1a01a].net.sourceforge.UFOAI[187]) Exited with exit code: 1 Warning com.apple.console