Index: guidance-power-manager.py
===================================================================
--- guidance-power-manager.py	(revision 648438)
+++ guidance-power-manager.py	(working copy)
@@ -948,7 +948,7 @@
         if self.act_call[action] == None:
             return # doing nothing anyway
         if idlesec > idleTime:
-            note = i18n("System idle for at least %s minutes, %s now." % (idleTime, self.act_notify[action]))
+            note = i18n("System idle for at least %s minutes, %s now.").arg(idleTime).arg(self.act_notify[action])
             self.notify(note, self.act_icon[action])
             QTimer.singleShot(2000, self.act_call[action])