diff -r 9db2758c3372 src/pkg/encoding/xml/marshal.go
--- a/src/pkg/encoding/xml/marshal.go	Thu Apr 26 13:32:05 2012 -0700
+++ b/src/pkg/encoding/xml/marshal.go	Fri Jun 08 10:56:26 2012 -0700
@@ -273,7 +273,7 @@
 	s := parentStack{printer: p}
 	for i := range tinfo.fields {
 		finfo := &tinfo.fields[i]
-		if finfo.flags&(fAttr|fAny) != 0 {
+		if finfo.flags&(fAttr) != 0 {
 			continue
 		}
 		vf := val.FieldByIndex(finfo.idx)
diff -r 9db2758c3372 src/pkg/encoding/xml/marshal_test.go
--- a/src/pkg/encoding/xml/marshal_test.go	Thu Apr 26 13:32:05 2012 -0700
+++ b/src/pkg/encoding/xml/marshal_test.go	Fri Jun 08 10:56:26 2012 -0700
@@ -185,6 +185,11 @@
 	AnyField AnyHolder `xml:",any"`
 }
 
+type AnyList struct {
+	XMLName struct{}    `xml:"l"`
+	Items   []AnyHolder `xml:",any"`
+}
+
 type AnyHolder struct {
 	XMLName Name
 	XML     string `xml:",innerxml"`
@@ -652,9 +657,16 @@
 		UnmarshalOnly: true,
 	},
 	{
-		Value:       &AnyTest{Nested: "known", AnyField: AnyHolder{XML: "<unknown/>"}},
-		ExpectXML:   `<a><nested><value>known</value></nested></a>`,
-		MarshalOnly: true,
+		ExpectXML: `<l><name>zaphod</name><vessel>heart of gold</vessel></l>`,
+		Value: &AnyList{
+			Items: []AnyHolder{{
+				XMLName: Name{Local: "name"},
+				XML:     "zaphod",
+			}, {
+				XMLName: Name{Local: "vessel"},
+				XML:     "heart of gold",
+			}},
+		},
 	},
 
 	// Test recursive types.