During separation from the S-IVB stage, the CSM autopilot apparently had difficulty determining direction of rotation. After the CSM hatch removal, there was a strong odor of burnt material in the tunnel. The leveling device on one of the experiment packages did not work. The closeup stereo camera was hard to operate and tended to fall over. The temperature in the lunar module was too cold during sleep periods. The biological isolation garment was uncomfortably hot and its visor fogged. The crew observed flashes at the rate of about one per minute in the command module at night.