In Fvwm 2.6.5, colorsets seem to be ignored in FvwmIconMan. I haven't touched my config for a long time, I've just been ignoring this issue, but decided to look at it today. I remember seeing colorsets working; I think it was in Fvwm 2.4, but now all my FvwmIconMan buttons are grey. None of my colorsets have a grey background.
screenshot, including key config: http://ethan.uk.to/static/tmp/fwvmiconman-colorset-fail.png full config: http://ethan.uk.to/static/tmp/fvwm/ -- Wir mussen wissen, wir werden wissen.