I guess one would face the same issue even in other brands....Video shooting in a hot and humid environment will raise the temperature of the body rapidly...But 3 minutes is a bit too short...Weird. When I go into Movie mode, SR is automatically switched off. So my videos do look wobbly though. -___-"" I do not hear whirling sounds. Also when the thermometer logo comes out, the video also will become choppy. That's like 3minutes into recording under hot and humid environment. I do hope Pentax can come out with a firmware which can address this problem. The red colored thermometer does makes me worry that I may 'hurt' the camera unintentionally.