diff -Nru pygobject-3.8.0/debian/changelog pygobject-3.8.0/debian/changelog
--- pygobject-3.8.0/debian/changelog	2013-04-03 04:04:37.000000000 -0400
+++ pygobject-3.8.0/debian/changelog	2013-04-26 16:22:05.000000000 -0400
@@ -1,3 +1,12 @@
+pygobject (3.8.0-2ubuntu1) raring-proposed; urgency=low
+
+  * debian/control*:
+    - Add Breaks for older python-aptdaemon and software-center to avoid
+      potential crash casued by new python-gi with old python-aptdaemon,
+      during upgrade of Ubuntu 12.10 to 13.04. (LP: #1173249)
+
+ -- Rodney Dawes <rodney.dawes@ubuntu.com>  Fri, 26 Apr 2013 16:21:44 -0400
+
 pygobject (3.8.0-2) experimental; urgency=low
 
   * debian/tests/python[23]-dbg: Redirect stderr to stdout, to avoid the
diff -Nru pygobject-3.8.0/debian/control pygobject-3.8.0/debian/control
--- pygobject-3.8.0/debian/control	2013-04-03 05:26:07.000000000 -0400
+++ pygobject-3.8.0/debian/control	2013-04-26 16:22:19.000000000 -0400
@@ -2,7 +2,6 @@
 # 
 # Modifications should be made to debian/control.in instead.
 # This file is regenerated automatically in the clean target.
-
 Source: pygobject
 Section: python
 Priority: optional
@@ -51,7 +50,9 @@
 Provides: ${python:Provides}
 Suggests: python-gi-cairo
 Breaks: python-gobject (<< 3.0.2-4),
-        python-nautilus (<= 1.1-1)
+        python-nautilus (<= 1.1-1),
+        python-aptdaemon (<< 1.0),
+        software-center (<= 5.6.0-0ubuntu2)
 Replaces: python-gobject (<< 3.0.2-4)
 Description: Python 2.x bindings for gobject-introspection libraries
  GObject is an abstraction layer that allows programming with an object
diff -Nru pygobject-3.8.0/debian/control.in pygobject-3.8.0/debian/control.in
--- pygobject-3.8.0/debian/control.in	2013-04-03 03:53:12.000000000 -0400
+++ pygobject-3.8.0/debian/control.in	2013-04-26 16:19:57.000000000 -0400
@@ -46,7 +46,9 @@
 Provides: ${python:Provides}
 Suggests: python-gi-cairo
 Breaks: python-gobject (<< 3.0.2-4),
-        python-nautilus (<= 1.1-1)
+        python-nautilus (<= 1.1-1),
+        python-aptdaemon (<< 1.0),
+        software-center (<= 5.6.0-0ubuntu2)
 Replaces: python-gobject (<< 3.0.2-4)
 Description: Python 2.x bindings for gobject-introspection libraries
  GObject is an abstraction layer that allows programming with an object