Looking good, a few comments:
Maybe the configuration files would be better saved in ~/.config/name (i.e. ~/.config/flit/flit.conf) rather than ~/?
If there is no sound enabled (the default for me) saving the flit config results in a seg fault and an empty conf file
If I open a large image in flpicsee it selects 25% zoom, but the title bar is off the screen with 1366x768 using flwm classic and I need to use <ctrl-m> x2 to get it back.
Thanks for your feedback! I agree the ~/.config location would be better housekeeping. I can move to that for both Fluff and Flit.
I'll try to troubleshoot your 'no sound' configuration crash.
Are you saying that a really big image is just going with 25% zoom in FlPicsee, even if that is not zoomed out enough to keep the full frame on-screen? What happens if you use the right-click menu and select "nice" or whole-image, or fill zoom levels? How big is the original image?
I'll try to investigate your issues and work on your suggestions in coming days.