Index: gajim-0.14.4/src/common/connection_handlers.py
===================================================================
--- gajim-0.14.4.orig/src/common/connection_handlers.py	2011-05-31 18:00:32.000000000 +0200
+++ gajim-0.14.4/src/common/connection_handlers.py	2011-10-23 19:52:10.679106710 +0200
@@ -1607,6 +1607,8 @@
             if keyID:
                 def decrypt_thread(encmsg, keyID):
                     decmsg = self.gpg.decrypt(encmsg, keyID)
+                    decmsg = self.connection.Dispatcher.replace_non_character(
+                        decmsg)
                     # \x00 chars are not allowed in C (so in GTK)
                     msgtxt = helpers.decode_string(decmsg.replace('\x00', ''))
                     encrypted = 'xep27'
Index: gajim-0.14.4/src/common/stanza_session.py
===================================================================
--- gajim-0.14.4.orig/src/common/stanza_session.py	2011-05-31 18:00:32.000000000 +0200
+++ gajim-0.14.4/src/common/stanza_session.py	2011-10-23 20:05:40.979105851 +0200
@@ -375,6 +375,12 @@
         for child in parsed.getChildren():
             stanza.addChild(node=child)
 
+        # replace non-character unicode
+        body = stanza.getBody()
+        if body:
+            stanza.setBody(
+                self.conn.connection.Dispatcher.replace_non_character(body))
+
         return stanza
 
     def decrypt(self, ciphertext):
Index: gajim-0.14.4/src/common/xmpp/dispatcher_nb.py
===================================================================
--- gajim-0.14.4.orig/src/common/xmpp/dispatcher_nb.py	2011-05-22 13:12:53.000000000 +0200
+++ gajim-0.14.4/src/common/xmpp/dispatcher_nb.py	2011-10-23 19:52:10.709106647 +0200
@@ -20,7 +20,7 @@
 different handlers to different XMPP stanzas and namespaces
 """
 
-import simplexml, sys, locale
+import re, simplexml, sys, locale
 from xml.parsers.expat import ExpatError
 from plugin import PlugIn
 from protocol import (NS_STREAMS, NS_XMPP_STREAMS, NS_HTTP_BIND, Iq, Presence,
@@ -89,6 +89,24 @@
                 self.UnregisterHandler, self.RegisterProtocol,
                 self.SendAndWaitForResponse, self.SendAndCallForResponse,
                 self.getAnID, self.Event, self.send]
+	
+        # \ufddo -> \ufdef range
+        c = u'\ufdd0'
+        r = c.encode('utf8')
+        while (c < u'\ufdef'):
+                c = unichr(ord(c) + 1)
+                r += '|' + c.encode('utf8')
+
+        # \ufffe-\uffff, \u1fffe-\u1ffff, ..., \u10fffe-\u10ffff
+        c = u'\ufffe'
+        r += '|' + c.encode('utf8')
+        r += '|' + unichr(ord(c) + 1).encode('utf8')
+        while (c < u'\U0010fffe'):
+                c = unichr(ord(c) + 0x10000)
+                r += '|' + c.encode('utf8')
+                r += '|' + unichr(ord(c) + 1).encode('utf8')
+
+        self.invalid_chars_re = re.compile(r)
 
     def getAnID(self):
         global outgoingID
@@ -174,6 +192,9 @@
             raise ValueError('Incorrect stream start: (%s,%s). Terminating.'
                     % (tag, ns))
 
+    def replace_non_character(self, data):
+        return re.sub(self.invalid_chars_re, u'\ufffd'.encode('utf-8'), data)
+
     def ProcessNonBlocking(self, data):
         """
         Check incoming stream for data waiting
@@ -189,6 +210,7 @@
         # disconnect method will never be called.
         # Is this intended?
         # also look at transports start_disconnect()
+        data = self.replace_non_character(data)
         for handler in self._cycleHandlers:
             handler(self)
         if len(self._pendingExceptions) > 0: