diff -urN pgjdbc.bin_geom/org/postgresql/jdbc2/AbstractJdbc2Connection.java pgjdbc.bin_uuid/org/postgresql/jdbc2/AbstractJdbc2Connection.java
--- pgjdbc.bin_geom/org/postgresql/jdbc2/AbstractJdbc2Connection.java	2011-09-25 00:48:19.801259402 +0300
+++ pgjdbc.bin_uuid/org/postgresql/jdbc2/AbstractJdbc2Connection.java	2011-09-25 00:56:22.916554156 +0300
@@ -164,6 +164,7 @@
             binaryOids.set(Oid.TEXT_ARRAY);
             binaryOids.set(Oid.POINT);
             binaryOids.set(Oid.BOX);
+            binaryOids.set(Oid.UUID);
         }        
         // the pre 8.0 servers do not disclose their internal encoding for
         // time fields so do not try to use them.
diff -urN pgjdbc.bin_geom/org/postgresql/jdbc2/AbstractJdbc2ResultSet.java pgjdbc.bin_uuid/org/postgresql/jdbc2/AbstractJdbc2ResultSet.java
--- pgjdbc.bin_geom/org/postgresql/jdbc2/AbstractJdbc2ResultSet.java	2011-09-25 00:48:19.802259397 +0300
+++ pgjdbc.bin_uuid/org/postgresql/jdbc2/AbstractJdbc2ResultSet.java	2011-09-25 00:53:57.253373855 +0300
@@ -166,8 +166,12 @@
             if (type.equals("unknown"))
                 return getString(columnIndex);
 
-            if (type.equals("uuid"))
+            if (type.equals("uuid")) {
+                if (isBinary(columnIndex)) {
+                    return getUUID(this_row[columnIndex - 1]);
+                }
                 return getUUID(getString(columnIndex));
+            }
 
             // Specialized support for ref cursors is neater.
             if (type.equals("refcursor"))
@@ -3163,6 +3167,15 @@
     {
         return data;
     }
+
+    /**
+     * Newer JVMs will return a java.util.UUID object, but it isn't
+     * available in older versions.
+     */
+    protected Object getUUID(byte[] data) throws SQLException
+    {
+        return data;
+    }
 
     private class PrimaryKey
     {
diff -urN pgjdbc.bin_geom/org/postgresql/jdbc3g/AbstractJdbc3gResultSet.java pgjdbc.bin_uuid/org/postgresql/jdbc3g/AbstractJdbc3gResultSet.java
--- pgjdbc.bin_geom/org/postgresql/jdbc3g/AbstractJdbc3gResultSet.java	2011-09-21 19:53:08.246972795 +0300
+++ pgjdbc.bin_uuid/org/postgresql/jdbc3g/AbstractJdbc3gResultSet.java	2011-09-25 01:00:40.115100120 +0300
@@ -15,6 +15,7 @@
 import java.util.Vector;
 
 import org.postgresql.core.*;
+import org.postgresql.util.ByteConverter;
 import org.postgresql.util.GT;
 import org.postgresql.util.PSQLState;
 import org.postgresql.util.PSQLException;
@@ -40,5 +41,10 @@
 
         return uuid;
     }
+
+    protected Object getUUID(byte[] data) throws SQLException
+    {
+        return new UUID(ByteConverter.int8(data, 0), ByteConverter.int8(data, 8));
+    }
 }
 
diff -urN pgjdbc.bin_geom/org/postgresql/jdbc3g/AbstractJdbc3gStatement.java pgjdbc.bin_uuid/org/postgresql/jdbc3g/AbstractJdbc3gStatement.java
--- pgjdbc.bin_geom/org/postgresql/jdbc3g/AbstractJdbc3gStatement.java	2011-09-21 19:53:08.247972788 +0300
+++ pgjdbc.bin_uuid/org/postgresql/jdbc3g/AbstractJdbc3gStatement.java	2011-09-25 00:58:35.156807525 +0300
@@ -15,6 +15,7 @@
 
 import org.postgresql.core.Oid;
 import org.postgresql.jdbc3.AbstractJdbc3Connection;
+import org.postgresql.util.ByteConverter;
 
 public abstract class AbstractJdbc3gStatement extends org.postgresql.jdbc3.AbstractJdbc3Statement
 {
@@ -32,7 +33,7 @@
     {
         if (x instanceof UUID && connection.haveMinimumServerVersion("8.3"))
         {
-            setString(parameterIndex, x.toString(), Oid.UUID);
+            setUuid(parameterIndex, (UUID)x);
         } else {
             super.setObject(parameterIndex, x);
         }
@@ -42,10 +43,20 @@
     {
         if (targetSqlType == Types.OTHER && x instanceof UUID && connection.haveMinimumServerVersion("8.3"))
         {
-            setString(parameterIndex, x.toString(), Oid.UUID);
+            setUuid(parameterIndex, (UUID) x);
         } else {
             super.setObject(parameterIndex, x, targetSqlType, scale);
         }
     }
-}
 
+    private void setUuid(int parameterIndex, UUID uuid) throws SQLException {
+        if (connection.binaryTransferSend(Oid.UUID)) {
+            byte[] val = new byte[16];
+            ByteConverter.int8(val, 0, uuid.getMostSignificantBits());
+            ByteConverter.int8(val, 8, uuid.getLeastSignificantBits());
+            bindBytes(parameterIndex, val, Oid.UUID);
+        } else {
+            bindLiteral(parameterIndex, uuid.toString(), Oid.UUID);
+        }
+    }
+}
\ No newline at end of file