Version:           2.3.3 (using KDE 4.3.3)
OS:                Linux
Installed from:    openSUSE RPMs

0. Open a folder with pictures much larger than the window and open a picture.

1. Change the zoom to something other than 100 % and other that "Fit" (e. g. 60 %).
2. Press the Next picture button.

Now the next picture is opened with 60 % zoom, this is correct. Then instead of this

1. Change the zoom to something other than 100 % and other that "Fit" (e. g. 60 %).
2. Click on the picture with MMB to switch the zoom to Fit.
3. Press the next picture button. The next picture is opened with zoom to Fit.
4. Click on the picture with MMB.

The zoom is changed to 100 %; it would be better if it changed to 60 %.

Why? In most cases when you browse a directory of (relatively to the screen) high resolution photos, they have the same size and you want to view sometimes a whole photo, sometimes a photo with a fixed bigger zoom (which might be 100 % but it is often less). With the current behavior, if you switch photos in Zoom to Fit mode, next time you want to view a photo with a bigger zoom, you have to set the zoom manually again.