=== modified file 'bin/widget/view/form.py'
--- bin/widget/view/form.py	2010-11-02 11:08:18 +0000
+++ bin/widget/view/form.py	2010-11-16 12:14:33 +0000
@@ -82,7 +82,8 @@
         self.view_type = 'form'
         self.model_add_new = False
         self.prev = 0
-        self.flag=False
+        self.window = window
+        self.flag = False
         self.current = 0
         for w in self.state_aware_widgets:
             if isinstance(w.widget, Button):
@@ -411,7 +412,7 @@
             field_focus.grab_focus()
 
         if button_focus:
-            self.screen.window.set_default(button_focus.widget)
+            self.window.set_default(button_focus.widget)
             if not field_focus:
                 button_focus.grab_focus()
         return True