=== modified file 'UpdateManager/Core/DistUpgradeFetcherCore.py'
--- UpdateManager/Core/DistUpgradeFetcherCore.py	2011-07-15 15:32:30 +0000
+++ UpdateManager/Core/DistUpgradeFetcherCore.py	2011-10-31 02:51:11 +0000
@@ -249,6 +249,12 @@
                   _("Fetching the upgrade failed. There may be a network "
                     "problem. "))
             return
+        if not self.authenticate():
+            self.error(_("Authentication failed"),
+                  _("Authenticating the upgrade failed. There may be a problem "
+                    "with the network or with the server. "))
+            self.cleanup()
+            return
         if not self.extractDistUpgrader():
             self.error(_("Failed to extract"),
                   _("Extracting the upgrade failed. There may be a problem "
@@ -261,12 +267,6 @@
                     "with the network or with the server. "))
             self.cleanup()
             return
-        if not self.authenticate():
-            self.error(_("Authentication failed"),
-                  _("Authenticating the upgrade failed. There may be a problem "
-                    "with the network or with the server. "))
-            self.cleanup()
-            return
         try:
             # check if we can execute, if we run it via sudo we will
             # not know otherwise, sudo/gksu will not raise a exception