I have the line 'xmodmap /home/michael/.xmodmaprc' in the appropriate part of my ~/.fluxbox/startup but when I start fluxbox, my keymap is not altered as per that file. When I run 'xmodmap /home/michael/.xmodmaprc' after fluxbox has already started up, my keymap changes appropriately. This behaviour has only started recently, either with a fluxbox update or a xorg update.
I've been using a similar line in my ~/.fluxbox/startup for a while and it works without issues e.g. with fluxbox 1.3.5-2+b1. Could you please check if you still have this issue or if it has been fixed in the meanwhile? Thanks