There are several screenshots in the above posting, and when it comes to fully white windows with a one pixel wide border, these borders sometimes get cut off left or right.
It only happens in the preview.
This looks rather ugly, because when a white window on a white website is shown, the user sees no visual border.
I sometimes add a one-pixel transparent border left or right, to outsmart the scaling algorithm.
Is there something I can configure to make the scaling algorithm for images work perfectly, even for the leftmost and rightmost pixels of an image?