Hello there fellow photographer!
It's frustrating because you focus on it with obsession and everyone's talking about it with the same obsession.
Stop doing that and enjoy your K-R, take pictures with it and use live view to focus in low tungsten light, and you won't have this FF problem. How many shots do you take under those conditions anyway?
There will be a fix, just be patient. And even if there won't be, it''s not that big of an issue really.
We are, generally, obsessed with perfection, when this perfection really doesn't exist and we allow this greedy state of mind to ruin the fun and kill our joy. (I have a perfectionist girlfriend -killing me
- and was a perfectionist myself, but i'm almost *laughs* cured)
Don't allow a minor thing ruin your joy