Fix: It is need to comment (with '#') in file /usr/share/themes/Ambiance/gtk-2.0/gtkrc the next line: widget "*.gtk-combobox-popup-menu.*" style "menuitem_text_is_fg_color_workaround" Restart buggy application.
Fix: themes/ Ambiance/ gtk-2.0/ gtkrc the next line: combobox- popup-menu. *" style "menuitem_ text_is_ fg_color_ workaround"
It is need to comment (with '#') in file /usr/share/
widget "*.gtk-
Restart buggy application.