Something funny I noticed.
So I don't know if anyone is following the D750 flare issue. But it does look a heck of a lot like "one of" the issues I was having with my (before the fix) 50APO. I briefly tested the 50APO on a MM and M9 and it didn't create that problem (the banding flare line at the top of the frame). It created other types of problems, but not the one that resembles the D750 issue. Which is also a M240 issue (or was till the lens was fixed).
So this begs the question, was the lens "adjusted" more then Leica let on, to accommodate for the change in the M240 (it would explain the two months I went without the lens). And would also explain why I think the lens has less saturated colors, and less pop/contrast. On the flip side, why didn't the M240 affect other lenses as badly?
I just found it really strange that the body flare problems the D750 is having, look a lot like the lens flare problems the 50APO was having. Now I'm wondering what the root of the problem is.. I'm hoping that Nikon gives a very clear and truthful answer to the problem. Maybe will shed some light on the problems the early 50APO lenses had.