I caused the game to crash in the war-room during combat both in 0.33 and 0.34aP2. As best I can recall, here are the steps/conditions:
1. Begin a mission, deploy your flagship plus whatever else you can.
2. Engage the enemy.
3. Pause the game by entering the War Room [TAB]
4. Turn Auto-pilot on [V]
5. Select a friendly ship.
6. Unpause the game [P]
7. Follow the selected friendly ship [F]
8. Return to the War Room, allowing the battle to continue [TAB]
9. Press [R] to target a nearby enemy ship
* game crashes, screen to black. Error message: "Fatal: null"