diff --git a/sources/scala/runtime/BoxedAnyArray.scala b/sources/scala/runtime/BoxedAnyArray.scala
index ae8f2021d..cf4dc668e 100755
--- a/sources/scala/runtime/BoxedAnyArray.scala
+++ b/sources/scala/runtime/BoxedAnyArray.scala
@@ -12,6 +12,7 @@ package scala.runtime;
 
 /** Arrays created by    new Array[T](length)    where T is a type variable
  */
+[serializable]
 final class BoxedAnyArray(val length: Int) extends BoxedArray {
 
   private var boxed = new Array[Object](length);
diff --git a/sources/scala/runtime/BoxedBoolean.java b/sources/scala/runtime/BoxedBoolean.java
index 2f539849e..700ceef4c 100755
--- a/sources/scala/runtime/BoxedBoolean.java
+++ b/sources/scala/runtime/BoxedBoolean.java
@@ -10,7 +10,9 @@
 
 package scala.runtime;
 
-public final class BoxedBoolean {
+public final class BoxedBoolean
+    implements java.io.Serializable
+{
 
     private final static BoxedBoolean TRUE = new BoxedBoolean(true);
     private final static BoxedBoolean FALSE = new BoxedBoolean(false);
diff --git a/sources/scala/runtime/BoxedBooleanArray.scala b/sources/scala/runtime/BoxedBooleanArray.scala
index f262bace8..69b0c55e6 100755
--- a/sources/scala/runtime/BoxedBooleanArray.scala
+++ b/sources/scala/runtime/BoxedBooleanArray.scala
@@ -10,6 +10,7 @@
 
 package scala.runtime;
 
+[serializable]
 final class BoxedBooleanArray(val value: Array[Boolean]) extends BoxedArray {
 
   def length: Int = value.length;
diff --git a/sources/scala/runtime/BoxedByte.java b/sources/scala/runtime/BoxedByte.java
index 24bd98579..7ffd72bff 100755
--- a/sources/scala/runtime/BoxedByte.java
+++ b/sources/scala/runtime/BoxedByte.java
@@ -7,7 +7,9 @@
 \*                                                                      */
 package scala.runtime;
 
-public final class BoxedByte extends BoxedNumber {
+public final class BoxedByte extends BoxedNumber
+    implements java.io.Serializable
+{
 
     private static final int MinHashed = -128;
     private static final int MaxHashed = 127;
diff --git a/sources/scala/runtime/BoxedByteArray.scala b/sources/scala/runtime/BoxedByteArray.scala
index c215c64da..673bbbac3 100755
--- a/sources/scala/runtime/BoxedByteArray.scala
+++ b/sources/scala/runtime/BoxedByteArray.scala
@@ -10,6 +10,7 @@
 
 package scala.runtime;
 
+[serializable]
 final class BoxedByteArray(val value: Array[Byte]) extends BoxedArray {
 
   def length: Int = value.length;
diff --git a/sources/scala/runtime/BoxedChar.java b/sources/scala/runtime/BoxedChar.java
index 6ae5fba4d..571808415 100755
--- a/sources/scala/runtime/BoxedChar.java
+++ b/sources/scala/runtime/BoxedChar.java
@@ -7,7 +7,9 @@
 \*                                                                      */
 package scala.runtime;
 
-public class BoxedChar extends BoxedNumber {
+public class BoxedChar extends BoxedNumber
+    implements java.io.Serializable
+{
 
     private static final int MinHashed = 0;
     private static final int MaxHashed = 255;
diff --git a/sources/scala/runtime/BoxedCharArray.scala b/sources/scala/runtime/BoxedCharArray.scala
index dae91679a..06d7554c9 100755
--- a/sources/scala/runtime/BoxedCharArray.scala
+++ b/sources/scala/runtime/BoxedCharArray.scala
@@ -10,6 +10,7 @@
 
 package scala.runtime;
 
+[serializable]
 final class BoxedCharArray(val value: Array[Char]) extends BoxedArray {
 
   def length: Int = value.length;
diff --git a/sources/scala/runtime/BoxedDouble.java b/sources/scala/runtime/BoxedDouble.java
index 4db14f709..439d08c97 100755
--- a/sources/scala/runtime/BoxedDouble.java
+++ b/sources/scala/runtime/BoxedDouble.java
@@ -7,7 +7,9 @@
 \*                                                                      */
 package scala.runtime;
 
-public class BoxedDouble extends BoxedNumber {
+public class BoxedDouble extends BoxedNumber
+    implements java.io.Serializable
+{
 
     public static BoxedDouble box(double value) {
 	return new BoxedDouble(value);
diff --git a/sources/scala/runtime/BoxedDoubleArray.scala b/sources/scala/runtime/BoxedDoubleArray.scala
index 7a958ce4d..75c8ee3e1 100755
--- a/sources/scala/runtime/BoxedDoubleArray.scala
+++ b/sources/scala/runtime/BoxedDoubleArray.scala
@@ -10,6 +10,7 @@
 
 package scala.runtime;
 
+[serializable]
 final class BoxedDoubleArray(val value: Array[Double]) extends BoxedArray {
 
   def length: Int = value.length;
diff --git a/sources/scala/runtime/BoxedFloat.java b/sources/scala/runtime/BoxedFloat.java
index 76a3c92a8..f6b48b0fd 100755
--- a/sources/scala/runtime/BoxedFloat.java
+++ b/sources/scala/runtime/BoxedFloat.java
@@ -7,7 +7,9 @@
 \*                                                                      */
 package scala.runtime;
 
-public class BoxedFloat extends BoxedNumber {
+public class BoxedFloat extends BoxedNumber
+    implements java.io.Serializable
+{
 
     public static BoxedFloat box(float value) {
 	return new BoxedFloat(value);
diff --git a/sources/scala/runtime/BoxedFloatArray.scala b/sources/scala/runtime/BoxedFloatArray.scala
index 4d9286520..956f9896a 100755
--- a/sources/scala/runtime/BoxedFloatArray.scala
+++ b/sources/scala/runtime/BoxedFloatArray.scala
@@ -10,6 +10,7 @@
 
 package scala.runtime;
 
+[serializable]
 final class BoxedFloatArray(val value: Array[Float]) extends BoxedArray {
 
   def length: Int = value.length;
diff --git a/sources/scala/runtime/BoxedInt.java b/sources/scala/runtime/BoxedInt.java
index af9b6c720..9ab99c3c7 100755
--- a/sources/scala/runtime/BoxedInt.java
+++ b/sources/scala/runtime/BoxedInt.java
@@ -7,7 +7,9 @@
 \*                                                                      */
 package scala.runtime;
 
-public final class BoxedInt extends BoxedNumber {
+public final class BoxedInt extends BoxedNumber
+    implements java.io.Serializable
+{
 
     private static final int MinHashed = -128;
     private static final int MaxHashed = 1024;
diff --git a/sources/scala/runtime/BoxedIntArray.scala b/sources/scala/runtime/BoxedIntArray.scala
index 00536cf5a..e782c00c5 100755
--- a/sources/scala/runtime/BoxedIntArray.scala
+++ b/sources/scala/runtime/BoxedIntArray.scala
@@ -10,6 +10,7 @@
 
 package scala.runtime;
 
+[serializable]
 final class BoxedIntArray(val value: Array[Int]) extends BoxedArray {
 
   def length: Int = value.length;
diff --git a/sources/scala/runtime/BoxedLong.java b/sources/scala/runtime/BoxedLong.java
index 7f1e9fc77..e914ec12d 100755
--- a/sources/scala/runtime/BoxedLong.java
+++ b/sources/scala/runtime/BoxedLong.java
@@ -7,7 +7,9 @@
 \*                                                                      */
 package scala.runtime;
 
-public class BoxedLong extends BoxedNumber {
+public class BoxedLong extends BoxedNumber
+    implements java.io.Serializable
+{
 
     public static BoxedLong box(long value) {
 	return new BoxedLong(value);
diff --git a/sources/scala/runtime/BoxedLongArray.scala b/sources/scala/runtime/BoxedLongArray.scala
index ea65e9df4..816d5b5bf 100755
--- a/sources/scala/runtime/BoxedLongArray.scala
+++ b/sources/scala/runtime/BoxedLongArray.scala
@@ -10,6 +10,7 @@
 
 package scala.runtime;
 
+[serializable]
 final class BoxedLongArray(val value: Array[Long]) extends BoxedArray {
 
   def length: Int = value.length;
diff --git a/sources/scala/runtime/BoxedShort.java b/sources/scala/runtime/BoxedShort.java
index c89cdca5f..6cb61aa00 100755
--- a/sources/scala/runtime/BoxedShort.java
+++ b/sources/scala/runtime/BoxedShort.java
@@ -7,7 +7,9 @@
 \*                                                                      */
 package scala.runtime;
 
-public final class BoxedShort extends BoxedNumber {
+public final class BoxedShort extends BoxedNumber
+    implements java.io.Serializable
+{
 
     private static final int MinHashed = -128;
     private static final int MaxHashed = 127;
diff --git a/sources/scala/runtime/BoxedShortArray.scala b/sources/scala/runtime/BoxedShortArray.scala
index 308a52040..97938e34d 100755
--- a/sources/scala/runtime/BoxedShortArray.scala
+++ b/sources/scala/runtime/BoxedShortArray.scala
@@ -10,6 +10,7 @@
 
 package scala.runtime;
 
+[serializable]
 final class BoxedShortArray(val value: Array[Short]) extends BoxedArray {
 
   def length: Int = value.length;
diff --git a/sources/scala/runtime/BoxedUnit.java b/sources/scala/runtime/BoxedUnit.java
index 80f5f2e1b..c896350a8 100755
--- a/sources/scala/runtime/BoxedUnit.java
+++ b/sources/scala/runtime/BoxedUnit.java
@@ -7,7 +7,9 @@
 \*                                                                      */
 package scala.runtime;
 
-public final class BoxedUnit {
+public final class BoxedUnit
+    implements java.io.Serializable
+{
 
     public final static BoxedUnit UNIT = new BoxedUnit();
 
diff --git a/sources/scala/runtime/compat/StringBuilder.scala b/sources/scala/runtime/compat/StringBuilder.scala
index f2dbab804..bfb790723 100644
--- a/sources/scala/runtime/compat/StringBuilder.scala
+++ b/sources/scala/runtime/compat/StringBuilder.scala
@@ -17,6 +17,10 @@ class StringBuilder {
     str.append(x);
     this
   }
+  def append(x: String): StringBuilder = {
+    str.append(x);
+    this
+  }
   def length(): Int = str.length();
   override def toString() = str.toString();
 }
diff --git a/sources/scala/runtime/matching/NonTerm.scala b/sources/scala/runtime/matching/NonTerm.scala
index 48c76d808..86defb4b0 100644
--- a/sources/scala/runtime/matching/NonTerm.scala
+++ b/sources/scala/runtime/matching/NonTerm.scala
@@ -46,7 +46,7 @@ case class HedgeNT(i:int) extends NonTerm with Ordered[HedgeNT] {
   }
 }; 
 
-object EMPTYHEDGE extends HedgeNT( 0, true ) ;
-object ANYHEDGE   extends HedgeNT( 1, true ) ;
+//case object EMPTYHEDGE extends HedgeNT( 0, true ) ;
+//case object ANYHEDGE   extends HedgeNT( 1, true ) ;
 object ANYTREE    extends TreeNT( 1 );