There is still an issue when rendering animation, even after SR3. Lights will sometimes become animated by themselves, after making a change at a certain keyframe. So always, before commencing your render, check to make sure the light(s) did not add their own keyframe and if so, naturally delete it. Also, unchecking/checking ANIMATED under a light's properties will not always "stick." Not sure why, but P5 switches it right back. -Tim