File: /usr/share/alacarte/Alacarte/ImageEditor.py
	
def get_icon_string(image):
    filename = image.props.file
    if filename is not None:
        # EDIT THIS LINE: return try_icon_name(filename)
        # WITH:
        return filename
    return image.props.icon_name
    

Recompile alacarte:

	cd /usr/share/alacarte/Alacarte
	sudo python -m compileall