--- a/bot.py
+++ b/bot.py
@@ -408,11 +408,19 @@ class Bot(threading.Thread):
 							for cc in c.getChildren():
 								if cc.getNamespace() == 'urn:ietf:params:xml:ns:xmpp-stanzas' and cc.getName() != 'text':
 									err = cc.getName()
-									if err == 'not-acceptable':
+									if err in ['not-acceptable', 'not-allowed']:
 										# we sent a message to a room we are not in
-										# probable cause is a MUC server restart
-										# let's restart the bot
-										self.restart()
+										# can be due to a MUC server restart
+										# can be a concurrency bug
+										if xmpp_c.nickname == self.nickname:
+											b.restart(message='Automatic restart of bridge')
+										else:
+											try:
+												p = b.getParticipant(xmpp_c.nickname)
+												p.say_on_XMPP_through_bridge(message.getBody())
+											except Bridge.NoSuchParticipantException:
+												b.restart(message='Automatic restart of bridge')
+										
 									elif err == 'forbidden':
 										# we don't have the permission to speak
 										# let's remove the bridge and tell admins

--- a/participant.py
+++ b/participant.py
@@ -313,10 +313,14 @@ class Participant:
 		if isinstance(self.xmpp_c, xmpp.client.Client):
 			self.muc.say(message)
 		elif not isinstance(self.irc_connection, ServerConnection):
-			if message[:4] == '/me ':
-				self.bridge.say(-1, '* '+self.nickname+' '+message[4:], on_irc=False)
-			else:
-				self.bridge.say(-1, '<'+self.nickname+'> '+message, on_irc=False)
+			self.say_on_XMPP_through_bridge(message)
+	
+	
+	def say_on_XMPP_through_bridge(message):
+		if message[:4] == '/me ':
+			self.bridge.say(-1, '* '+self.nickname+' '+message[4:], on_irc=False)
+		else:
+			self.bridge.say(-1, '<'+self.nickname+'> '+message, on_irc=False)
 	
 	
 	def sayOnXMPPTo(self, to, message):