See: http://digicame-info.com/2014/06/k-3-12.html
The above page is in Japanese, Google translation into English can be found here.
In short, new firmwares will offer new software function on "diffraction elimination", like which already implemented by the Fuji for their latest X-series bodies, In addition, the effect of the so-called "occasional" K-3 mirror-flapping issue is minimised, for what is told.