I am losing my mind trying to solve this issue...  I have tried exporting a sequence of around 500 images three different times today.  Every time, I reinitialize the sequence and start from scratch, but somewhere in the course of the sequence, Lightroom randomly will decide to interpret the white balance of a single frame differently than those preceding it, even when all of the raw values are identical.  Further, all of the files after this "switch" will have this awful color shift.  What file it will happen at is inconsistent on each of the three exports, but it is happening every single time I export it.  Any idea what is up?

       

This is an effect that Lightroom sometimes introduces, when you use non-linear tools too much. Especially Dehaze is one of those tools, avoid using it with values greater then 15 or 20. Try it out. Clarity, Whites and Blacks should be used carefully too!
See this faq: http://forum.lrtimelapse.com/Thread-what...htroom-acr

Thanks Gunther. Will try turning those effects off.