Created attachment 2360 [details] startup criticals fix Fix for errors showing at startup, my guess is trying to update style of MessageView which is not fully drawn yet. (claws-mail:53262): Gtk-CRITICAL **: 22:11:22.712: gtk_style_set_background: assertion 'window != NULL' failed (claws-mail:53262): Gdk-CRITICAL **: 22:11:22.713: gdk_window_set_background: assertion 'GDK_IS_WINDOW (window)' failed
I do not get these warning on startup.
After investigating little further into this, it happens for 2 layouts only: Three columns, Small screen. Try changing View->Layout and rerun claws.