Comment 4 for bug 631328

Barry, the second argument of the signal indicates whether the action is authorized or not. For the synaptic backend it must be True because synaptic must be run as root to perform the update and is always authorized. I can't think of a way to know if synaptic has been authorized or not to do the check.

I think your fix is incorrect because you set the second argument to 0 which is "False", and the package list won't be refreshed. Unless my boolean math is wrong, the patch should be :

--- /usr/lib/python2.7/dist-packages/UpdateManager/backend/InstallBackendSynaptic.py 2010-09-07 17:30:58.000000000 +0200
+++ UpdateManager/backend/InstallBackendSynaptic.py 2010-11-11 19:24:34.000000000 +0100
@@ -34,7 +34,7 @@
         action, tempf = data
         if tempf:
             tempf.close()
- self.emit("action-done", action)
+ self.emit("action-done", action,True)

     def update(self):
         opt = ["--update-at-startup"]

Please also consider bug 674175, which prevent the aptdaemon backend to be loaded in Natty.
Thanks.