Merge branch 'master' of github.com:celery/celery

CONTRIBUTORS.txt

@@ -156,3 +156,4 @@ Antoine Legrand, 2014/01/09
 Pepijn de Vos, 2014/01/15
 Dan McGee, 2014/01/27
 Paul Kilgo, 2014/01/28
+Martin Davidsson, 2014/02/08

docs/userguide/canvas.rst

@@ -651,6 +651,13 @@ Chords
 
 .. versionadded:: 2.3
 
+.. note::
+
+    Tasks used within a chord must *not* ignore their results. If the result
+    backend is disabled for *any* task (header or body) in your chord you
+    should read ":ref:`chord-important-notes`".
+    
+
 A chord is a task that only executes after all of the tasks in a group have
 finished executing.