--- a/i18n/en.po	Mon Oct 25 17:54:00 2010 +0200
+++ b/i18n/en.po	Mon Oct 25 17:59:25 2010 +0200
@@ -3919,7 +3919,8 @@
 msgid "unknown external entity"
 msgstr ""
 
-msgid "unknown property key"
+#, python-format
+msgid "unknown property key %s"
 msgstr ""
 
 msgid "unknown vocabulary:"