I have sort-of-recently happily migrated from fvwm 2.5.26 under suse 11 to fvwm 2.6.6 under suse Leap 42, but only today I have noticed a funny behaviour. When I iconify an xterm (which I don’t do often, here is why I realized this only today), instead of a terminal icon (what I had before and what I’d like to have) I obtain a mini-image of the terminal window.
I haven’t changed my .fvwm2rc which has entries like
ImagePath /usr/share/X11/fvwm2/pixmaps:/usr/share/wallpapers:$[FVWM_USERDIR]:+
...
Style xterm Icon xterm.xpm
Style urxvt Icon rterm.xpm
Style the Icon page2.xpm
Style Pine Icon mail1.xpm, StartsOnDesk 0, SkipMapping
The file xterm.xpm exists in /usr/share/X11/fvwm2/pixmaps but seems to be ignored in favour of the mini-image, all other icons for other terminals/editors are honoured.