From 5874457df2f4dda2ac460323397c3397dc9a923a Mon Sep 17 00:00:00 2001
From: ThomasV <thomasv@gitorious>
Date: Sun, 28 Oct 2012 10:22:12 +0100
Subject: [PATCH] fix: subscriptions

---
 lib/interface.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/interface.py b/lib/interface.py
index 4c792b5c..354db2f9 100644
--- a/lib/interface.py
+++ b/lib/interface.py
@@ -422,7 +422,9 @@ class Interface(threading.Thread):
             with self.lock:
                 if self.subscriptions.get(channel) is None: 
                     self.subscriptions[channel] = []
-                self.subscriptions[channel] += sub
+                for message in sub:
+                    if message not in self.subscriptions[channel]:
+                        self.subscriptions[channel].append(message)
 
         if self.protocol in 'st':
             with self.lock: