Gallery app was very confusing until figuring out that pulls and swipes work only on upper half of the screen when additional non-pulley menu is present. This means that you have to tap on the picture to activate this extra menu, and then start swiping on upper half of the screen. Why not having all of the selections in a pulley already introduced? Or in the end I would be happy if one could just pull anywhere on the screen to go back to thumbnails screen, no matter whether it was the bottom half still showing parts of the picture or the upper half with the menu. But in the end I think these problems are minor, and can be devised around with some additional design. It is not that Sailfish has to be perfected on the first release version of UX.