Problem with positional light at stereo rendering

[schizo]

Hi Jesse,

I rendered an older v1.76 animation as stereo. Had to do this in V1.82 because 1.76 had problems with the positional light I use. I rendered both images (left and right) new because I also changed DEstop (than again for the tip).
Everything looks fine at the first frames. But after about 500 frames I noticed problems with the positional light. It should always be on the same y-coordinate with a different x-positon at the resulting image. But sometimes the left-right-lightviews are not side by side but one upon the other. This affects only the positional visible light, but not the fractal itself.
I will send you a private message with the link to the animation. Would be great when you could have a look at it.
Thank you.