FULL PRODUCT VERSION :
java version "1.6.0_07"
java version "1.6.0_10"
java version "1.6.0_11"


ADDITIONAL OS VERSION INFORMATION :
Windows XP SP3

EXTRA RELEVANT SYSTEM CONFIGURATION :
JMF 2.1.1e

A DESCRIPTION OF THE PROBLEM :
If I use version 1.6.0_11 or 1.6.0_10 MidiSequencer.getSequencer() throws an exception
If I rollback to version 1.6.0_07, everything works ok!
It is a definitive problem after updates ( 10 or 11 )

I report it because I cannot find this in your bugs database!

It also works good with java 1.5

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Very simple:
Sequencer seq = MidiSequencer.getSequencer();

using java 1.5 to .6.0_07 returns a correct sequencer

if we use 1.6.0_10 or 1.6.0_11 I just get an exception:
MIDI OUT Transmitter not available!


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
  To play my MIDI file again after update 1.6.0_10

ERROR MESSAGES/STACK TRACES THAT OCCUR :
04-Jan-2009 11:46:07 lookingnotgood.TheMIDINightmare GetSequencer
SEVERE: null
javax.sound.midi.MidiUnavailableException: MIDI OUT transmitter not available
        at com.sun.media.sound.AbstractMidiDevice.createTransmitter(AbstractMidiDevice.java:444)
        at com.sun.media.sound.AbstractMidiDevice.getTransmitter(AbstractMidiDevice.java:299)
        at javax.sound.midi.MidiSystem.getSequencer(MidiSystem.java:451)
        at javax.sound.midi.MidiSystem.getSequencer(MidiSystem.java:348)
        at lookingnotgood.TheMIDINightmare.GetSequencer(Main.java:35)
        at lookingnotgood.Main.main(Main.java:84)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package lookingnotgood;

import java.io.File;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.sound.midi.MidiDevice;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Sequence;
import javax.sound.midi.Sequencer;

/**
 *
 * @author Javier  ###@###.###
 */

 class TheMIDINightmare
 {
     File f;
     Sequence seq;
     Sequencer TheSequencer;
     int DeviceIndex = -1;


     public void GetSequencer()
     {
         MidiDevice dev;
         TheSequencer = null;
        try {
            TheSequencer = MidiSystem.getSequencer();
        } catch (MidiUnavailableException ex) {
            Logger.getLogger(TheMIDINightmare.class.getName()).log(Level.SEVERE, null, ex);
        }
     }

     void GetSequence(String aFileName)
     {
         boolean R = false;
         try
         {
            f = new File(aFileName);
            seq = MidiSystem.getSequence(f);

         }
         catch(Exception e)
         {
         }
     }


     public void Go()
     {
             try
             {
                    TheSequencer.open();
                    TheSequencer.setSequence(seq);
                    TheSequencer.setLoopCount(0);
                    TheSequencer.start();

             }
             catch(Exception e)
             {

             }

         }
 }

public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        TheMIDINightmare test;

        test = new TheMIDINightmare();

        test.GetSequencer(); // HERE IS THE BUG

        test.GetSequence("c:\\tmp\\a.mid"); // I play this file with version 1.6.0_07
        test.Go();
    }

}


---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Rollback the update 1.6.0_10 or 1.6.0_11 to 1.6.0_07
and everything goes perfect!

SUPPORT :
YES

Release Regression From : 6u7
The above release value was the last known release where this 
bug was not reproducible. Since then there has been a regression.