The problem could be solved by correcting a typo in /usr/lib/pymodules/python2.7/istanbul/main/save_window.py
Gtk.DrawingArea.do_realize(self) has to be changed to gtk.DrawingArea.do_realize(self)
The problem could be solved by correcting a typo in /usr/lib/ pymodules/ python2. 7/istanbul/ main/save_ window. py
Gtk.DrawingArea .do_realize( self) has to be changed to gtk.DrawingArea .do_realize( self)