I've noticed an issue when opening raw files in AP1.6.6 that I'm sure wasn't there in the previous version. Also it doesn't show up when I
use Adobe Camera Raw (ACR), Lightroom or just Preview in OSX El Capitan. It seems as if Affinity is showing more of the image, if you view the
attached screen shots Affinity is showing a lot more of the leaves in the top right corner as well as a dark band across the top of the image.
Lightroom is showing less of the leaves in the top right corner and no dark band. Preview and ACR display the image the same is Lightroom.
I use a Panasonic compact TZ60 raw files. Affinity displays the equivalent jpg without this problem.
Just checked in LR the image is 3264 x 4896 pixels and in Affinity it is 3280 x 4912