I did set the indentation to 0 which broke mousepad. {{{ (mousepad:5625): GLib-GIO-CRITICAL **: 20:16:15.725: GObject property 'value' on a 'GtkSpinButton' object is out of schema-specified range for key 'tab-width' of 'org.xfce.mousepad.preferences.view': 0 ** GLib-GIO:ERROR:../../../../gio/gsettings.c:2581:g_settings_binding_free: assertion failed: (!binding->running) Aborted }}}
Fixed in: https://git.xfce.org/apps/mousepad/commit/?id=15f4e5a47bd85d2cd831f65d6a66e548ad4d5708 But unreleased.
There, 0.4.1 released!