Yes, I have always had those two checkboxes marked (“Disable network-adaptive” and “Disable multi-pass”) and always have the slider on ‘max quality’. Strange thing is that with 4.1.29 I do not see the slow pass that slowly renders the fonts into pixel-perfectness (my first post was based on 4.1.28). Colored fonts with high-contrast combinations are now always a bit blurry. Black text on white background always has been perfect though.
Anyway, I understand that this is a tricky area and thanks for your explanations. I cross my fingers that the additional RGB-pass will solve things and make it into the product some time soon 🙂