DR + Backburner Bucket issue

[baw]

I have seen on this forum the same problem I am having but I havent found a resolution to it. Its when one computer renders its bucket a lighter tone then the rest. It doesnt do it if I render from my computer using DR. But If I sent the job through backburner and render it that way, then it does it. Any ideas?

[baw]

update to this. It doesnt seem to be doing it during rendering but during the pre-pass stage. I'm just render single frame. Not loading or saving IR map.