1) Create an image with the resolution different from your screen resolution 2) Set some fixed zoom level, e.g. 30% 3) Toggle "Use same aspect as pixels" button The image on a screen doesn't change, though it should be rezoom'ed. 4) Set zoom level to e.g. 31% The image is rezoom'ed taking the toggled button into account.
In general, we have a problem updating when the zoomlevel changes. I have a set of patches by Tanmaya Mahapatra that implement ctrl-0 for zoom to 100%, and that's broken as well.
Git commit a66a7dd353f63eed660846420bb8f8a52dae7671 by Boudewijn Rempt. Committed on 29/02/2012 at 15:04. Pushed by rempt into branch 'master'. Update the canvas on changing the aspect M +1 -0 krita/ui/kis_zoom_manager.cc http://commits.kde.org/calligra/a66a7dd353f63eed660846420bb8f8a52dae7671