An interesting development tonight. I have been working at +6 all day on my 50 1.2 and been pretty happy, thought I might see a bit of front focus this evening, set back to 0 and everything is totally spot on. Will check tomorrow once the sun comes up if it is the lighting or if it just needed a bit of working in as the lens and body are brand new (makes no sense, I know).
What procedure did you use the determine the microadjustment amount? Did you use a tripod?