diff --git a/system-config-printer-asyncipp-traceback.patch b/system-config-printer-asyncipp-traceback.patch
index e33232f..61fa4cc 100644
--- a/system-config-printer-asyncipp-traceback.patch
+++ b/system-config-printer-asyncipp-traceback.patch
@@ -1,31 +1,44 @@
 diff -up system-config-printer-1.2.0/asyncipp.py.asyncipp-traceback system-config-printer-1.2.0/asyncipp.py
---- system-config-printer-1.2.0/asyncipp.py.asyncipp-traceback	2010-03-25 16:36:02.264236367 +0000
-+++ system-config-printer-1.2.0/asyncipp.py	2010-03-25 16:36:08.558237409 +0000
-@@ -189,20 +189,20 @@ class _IPPConnectionThread(threading.Thr
+--- system-config-printer-1.2.0/asyncipp.py.asyncipp-traceback	2010-03-26 10:26:00.420734896 +0000
++++ system-config-printer-1.2.0/asyncipp.py	2010-03-26 10:26:03.187725661 +0000
+@@ -59,6 +59,7 @@ class _IPPConnectionThread(threading.Thr
+         self._auth_handler = auth_handler
+         self._auth_queue = Queue.Queue (1)
+         self.user = None
++        self._destroyed = False
+         debugprint ("+%s" % self)
+ 
+     def __del__ (self):
+@@ -157,6 +158,7 @@ class _IPPConnectionThread(threading.Thr
+             self._queue.task_done ()
+ 
+         debugprint ("Thread exiting")
++        self._destroyed = True
+         del self._conn # already destroyed
+         del self._reply_handler
+         del self._error_handler
+@@ -189,18 +191,20 @@ class _IPPConnectionThread(threading.Thr
  
      def _reply (self, result):
          def send_reply (result):
 -            self._reply_handler (self._conn, result)
-+            if self._reply_handler:
++            if not self._destroyed and self._reply_handler:
 +                self._reply_handler (self._conn, result)
              return False
  
 -        if self._reply_handler:
--            gobject.idle_add (send_reply, result)
-+        gobject.idle_add (send_reply, result)
++        if not self._destroyed and self._reply_handler:
+             gobject.idle_add (send_reply, result)
  
      def _error (self, exc):
          def send_error (exc):
 -            self._error_handler (self._conn, exc)
-+            if self._error_handler:
++            if not self._destroyed and self._error_handler:
 +                self._error_handler (self._conn, exc)
              return False
  
 -        if self._error_handler:
--            debugprint ("Add %s to idle" % self._error_handler)
--            gobject.idle_add (send_error, exc)
-+        debugprint ("Add %s to idle" % self._error_handler)
-+        gobject.idle_add (send_error, exc)
++        if not self._destroyed and self._error_handler:
+             debugprint ("Add %s to idle" % self._error_handler)
+             gobject.idle_add (send_error, exc)
  
- ###
- ### This is the user-visible class.  Although it does not inherit from
diff --git a/system-config-printer.spec b/system-config-printer.spec
index 8749f94..2667254 100644
--- a/system-config-printer.spec
+++ b/system-config-printer.spec
@@ -7,7 +7,7 @@
 Summary: A printer administration tool
 Name: system-config-printer
 Version: 1.2.0
-Release: 9.1%{?dist}
+Release: 10%{?dist}
 License: GPLv2+
 URL: http://cyberelk.net/tim/software/system-config-printer/
 Group: System Environment/Base
@@ -125,7 +125,8 @@ printers.
 %patch11 -p1 -b .cdi-search-harder
 
 # Fixed traceback in asyncipp (bug #576932).
-%patch12 -p1 -b .cdi-search-harder
+# More async traceback fixes (Ubuntu #547075).
+%patch12 -p1 -b .asyncipp-traceback
 
 # check-device-ids: use correct paths for LSB model URIs.
 %patch13 -p1 -b .cdi-lsb-paths
@@ -252,7 +253,10 @@ rm -rf %buildroot
 exit 0
 
 %changelog
-* Thu Mar 25 2010 Tim Waugh <twaugh@redhat.com> - 1.2.0-9.1
+* Fri Mar 26 2010 Tim Waugh <twaugh@redhat.com> - 1.2.0-10
+- More async traceback fixes (Ubuntu #547075).
+
+* Thu Mar 25 2010 Tim Waugh <twaugh@redhat.com> - 1.2.0-9
 - check-device-ids: use correct paths for LSB model URIs.
 - Fixed cdi-search-harder patch.