Hi dev-7,
Frankly, I not tested Gnumeric when I update it. I only run it, press a couple of buttons, then close.
Problem #1 is partially reproducible on my side. Can you help more with it? Please, open terminal, run "gnumeric" in it, go to aforementioned settings, and then copy error messages from the terminal, when Gnumeric crashes. I get only warnings like:
(gnumeric:20514): Gtk-WARNING **: drawing failure for widget 'GtkColorPlane': NULL pointer
(gnumeric:20514): Gtk-WARNING **: drawing failure for widget 'GtkGrid': NULL pointer
(gnumeric:20514): Gtk-WARNING **: drawing failure for widget 'GtkOverlay': NULL pointer
(gnumeric:20514): Gtk-WARNING **: drawing failure for widget 'GtkColorEditor': NULL pointer
(gnumeric:20514): Gtk-WARNING **: drawing failure for widget 'GtkBox': NULL pointer
(gnumeric:20514): Gtk-WARNING **: drawing failure for widget 'GtkColorChooserWidget': NULL pointer
(gnumeric:20514): Gtk-WARNING **: drawing failure for widget 'GtkBox': NULL pointer
(gnumeric:20514): Gtk-WARNING **: drawing failure for widget 'GtkDialog': NULL pointer
No crashes. But OK / Cancel buttons disappeared on that color selection dialog, and re-appear back when I hover mouse on them.
Problem #2
It's a more general SliTaz problem with the GTK+3 applications. We have no GTK+3 specific icons in our icon theme (yet). As a fast solution you can use Paper icon theme that I like so much, and that is GTK+3 compatible. But, please note the package huge size.
I planned to make new SliTaz icon theme, but most of my plans still be plans :)
Problem #3
Seems, I see the root of this problem in the terminal message, but I see no solution yet:
GLib-GIO-Message: Using the 'memory' GSettings backend. Your settings will not
be saved or shared with other applications.
We need some GNOME related stuff. Some with the GSettings in the name. Then Gnumeric will be available to store its settings.