diff -r ab43f3e40b9d -r ffa8ee5ee2fe graphics/GraphicCommons.py
--- a/graphics/GraphicCommons.py	Wed Dec 19 13:32:51 2012 +0100
+++ b/graphics/GraphicCommons.py	Tue Jan 15 10:57:06 2013 +0100
@@ -395,7 +395,7 @@
             self.LastRefreshTimer.start()
             self.TimerAccessLock.release()
     
-    def NewDataAvailable(self, *args, **kwargs):
+    def NewDataAvailable(self, tick, *args, **kwargs):
         self.TimerAccessLock.acquire()
         if self.LastRefreshTimer is not None:
             self.LastRefreshTimer.cancel()