diff -pur dbus/dbus/dbus-spawn.c dbus.new/dbus/dbus-spawn.c
--- dbus/dbus/dbus-spawn.c	2006-05-05 18:59:22.000000000 +0300
+++ dbus.new/dbus/dbus-spawn.c	2006-11-07 16:50:12.135736256 +0200
@@ -1140,6 +1140,16 @@ _dbus_spawn_async_with_babysitter (DBusB
 	}
       else if (grandchild_pid == 0)
 	{
+	  int p;
+          /* put the child into a new session and process group, so that
+           * killpg() can be used safely */
+          if (setsid () == -1)
+            _dbus_warn ("setsid() failed: %s\n", _dbus_strerror (errno));
+          errno = 0;
+          p = getpriority(PRIO_PROCESS, 0);
+          if (!errno && p < 0) {
+            setpriority(PRIO_PROCESS, 0, 0);
+          }
 	  do_exec (child_err_report_pipe[WRITE_END],
 		   argv,
 		   child_setup, user_data);