diff -r 13bcc96a5a6c -r 78961db80bae structs.go
--- a/structs.go	Wed Dec 28 16:10:20 2011 -0700
+++ b/structs.go	Thu Dec 29 09:48:36 2011 -0700
@@ -105,6 +105,9 @@
 	Type string `xml:"attr"`
 	Lang string `xml:"attr"`
 	Error *Error
+	Subject *Generic
+	Body *Generic
+	Thread *Generic
 	Any *Generic
 }
 var _ xml.Marshaler = &Message{}
@@ -118,6 +121,9 @@
 	Type string `xml:"attr"`
 	Lang string `xml:"attr"`
 	Error *Error
+	Show *Generic
+	Status *Generic
+	Priority *Generic
 	Any *Generic
 }
 var _ xml.Marshaler = &Presence{}
@@ -144,6 +150,7 @@
 	Any *Generic
 }
 var _ xml.Marshaler = &Error{}
+var _ os.Error = &Error{}
 
 // Holds an XML element not described by the more specific types.
 type Generic struct {
@@ -302,6 +309,11 @@
 	return buf.Bytes(), nil
 }
 
+func (er *Error) String() string {
+	bytes, _ := er.MarshalXML()
+	return string(bytes)
+}
+
 func (m *Message) XName() string {
 	return "message"
 }