--- /usr/lib/python3.2/mailbox.py	2013-02-20 08:56:36.000000000 -0600
+++ mailbox.py	2014-08-31 19:48:12.149684957 -0500
@@ -1125,28 +1125,32 @@
     def get_sequences(self):
         """Return a name-to-key-list dictionary to define each sequence."""
         results = {}
-        f = open(os.path.join(self._path, '.mh_sequences'), 'r')
         try:
-            all_keys = set(self.keys())
-            for line in f:
-                try:
-                    name, contents = line.split(':')
-                    keys = set()
-                    for spec in contents.split():
-                        if spec.isdigit():
-                            keys.add(int(spec))
-                        else:
-                            start, stop = (int(x) for x in spec.split('-'))
-                            keys.update(range(start, stop + 1))
-                    results[name] = [key for key in sorted(keys) \
-                                         if key in all_keys]
-                    if len(results[name]) == 0:
-                        del results[name]
-                except ValueError:
-                    raise FormatError('Invalid sequence specification: %s' %
-                                      line.rstrip())
-        finally:
-            f.close()
+            f = open(os.path.join(self._path, '.mh_sequences'), 'r')
+        except IOError:
+            pass
+        else:
+            try:
+                all_keys = set(self.keys())
+                for line in f:
+                    try:
+                        name, contents = line.split(':')
+                        keys = set()
+                        for spec in contents.split():
+                            if spec.isdigit():
+                                keys.add(int(spec))
+                            else:
+                                start, stop = (int(x) for x in spec.split('-'))
+                                keys.update(range(start, stop + 1))
+                        results[name] = [key for key in sorted(keys) \
+                                             if key in all_keys]
+                        if len(results[name]) == 0:
+                            del results[name]
+                    except ValueError:
+                        raise FormatError('Invalid sequence specification: %s' %
+                                          line.rstrip())
+            finally:
+                f.close()
         return results
 
     def set_sequences(self, sequences):