Game crashes to main menu with a message "Cannot invert matrix". First three times it was while testing cannons or beams against an AI target, last one was while in astronaut mode moving between ships, with no enemies having been spawned. Client log shows many instances of "Exception: Projectile physics null for sector xxxx"
From the logs, it appears the server and client continue to run, as the log doesn't end until the main menu is closed according to time stamps.