diff -r 6297fcddf912 Lib/idlelib/EditorWindow.py
--- a/Lib/idlelib/EditorWindow.py	Fri Apr 19 12:57:54 2013 -0400
+++ b/Lib/idlelib/EditorWindow.py	Tue Apr 23 23:46:16 2013 -0500
@@ -117,6 +117,7 @@
     from idlelib.MultiStatusBar import MultiStatusBar
 
     help_url = None
+    inhibit_close = False
 
     def __init__(self, flist=None, filename=None, key=None, root=None):
         if EditorWindow.help_url is None:
@@ -996,9 +997,15 @@
                     self.top.deiconify()
                 self.top.lower()
                 self.top.lift()
-            return self.io.maybesave()
+            # inhibit closing of the window
+            self.inhibit_close = True
+            ret = self.io.maybesave()
+            self.inhibit_close = False
+            return ret
 
     def close(self):
+        if self.inhibit_close:
+            return "break"
         reply = self.maybesave()
         if str(reply) != "cancel":
             self._close()
diff -r 6297fcddf912 Lib/idlelib/IOBinding.py
--- a/Lib/idlelib/IOBinding.py	Fri Apr 19 12:57:54 2013 -0400
+++ b/Lib/idlelib/IOBinding.py	Tue Apr 23 23:46:16 2013 -0500
@@ -318,6 +318,7 @@
                   title="Save On Close",
                   message=message,
                   default=tkMessageBox.YES,
+                  parent=self.editwin.top,
                   master=self.text)
         if confirm:
             reply = "yes"