Running feh in fullscreen mode under dwm gives me the following warning: "feh WARNING: Window Manager does not support MWM hints. To get a borderless window I have to bypass your wm."
After that the feh window appears fullscreen but doesn't seem to have focus, it doesn't accept keyboard input. The problem disappears if Firefox is running or has been run once before using feh. This seems to be dwm-specific, it doesn't happen under wmii.
