unexpected xterm icon

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.

Found solution myself … apparently xterm now has an “activeIcon” property which could be disabled starting it as xterm -ai … or even better, since this feature is fully supported by fvwm, adding to the style

Style xterm         Icon xterm.xpm,IconOverride