Hmm, bug report. Running 9.6. Entered combat with some floaty urchin things ("muckstars", I guess?) for the first time. I middle mouse clicked one to look at it and the game crashed with:
(zenity:7586): Gtk-WARNING **: 18:30:57.245: Could not load a pixbuf from /org/gtk/libgtk/icons/48x48/status/image-missing.png.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:../../../../gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /org/gtk/libgtk/icons/48x48/status/image-missing.png: Unrecognized image file format (gdk-pixbuf-error-quark, 3)
Aborted (core dumped)
OpenXcom has crashed: /home/scoundrel/games/xcom/mods2/mods/XComFiles/Resources/Races_Compilation/MuckstarRace/inventory_MUCKSTAR.png: OpenXcom is supporting only 8bit graphic
Let me know if any further data would be helpful, and I'll try to provide.
Awesome mod, by the way. It's got a great feel, and I think the progression of your organizations capabilities vs the difficulties of missions (recently took a crack at durathread factory with grenade launchers, thrown explosives, nitro rifles, and desert eagles - I was really close, but had to withdraw with only 4 of my 6 original crew). I'm already a big fan!