[STUMP] Window Manager does not support MWM hints

>Depending how I am launching the feh image viewer, I get following
>error:
>
>feh WARNING: Window Manager does not support MWM hints. To get a
>borderless window I have to bypass your wm.
>
>This is happening, when I try to press "q" in feh, to quit the
>viewer. Sometimes it works, sometimes not in stumpwm, while in other
>window managers it works always.

I think in the tiled mode borderless windows are the only option.

I have checked in the floating mode, there we probably have an actual
lack of feature.