When doing stress tests with 1200 random MIDI files from the Internet, 75 failed in 1.4.2beta. Furthermore, the exceptions have a "null" message. This behavior is different from 1.4.1.

Examples (attached to this bug):
- bewitd_a.mid: threw "could not get sequence from file" in 1.4.1, but "null" in 1.4.2

- bitedust.mid: throw IOException "Stream Read Error" in 1.4.1, but "null" in 1.4.2

- secret.mid: fails in all 1.4.x (along with 73 others)

- yourtime.mid: fails in 1.4.2 but not in 1.4.1

- bohem_al.mid: fails in 1.4.1 and 1.4.2, but loads OK in 1.4.0.

------------
Test program:

import    java.io.*;
import    javax.sound.midi.*;

public class MidiFileTester {
    
    // 0: test with MidiSystem.getSequence(File)
    // 1: test with MidiSystem.getSequence(InputStream)
    // 2: test with Sequencer.setSequence(InputStream)
    static int TEST_METHOD=0;
    
    public static void main(String[] args) throws Exception {
	if (args.length == 0) {
	    System.out.println("No parameter specified");
	    System.exit(1);
	}
	int total=0; int succ=0;
	long startTime=System.currentTimeMillis();

	switch (TEST_METHOD) {
	    case 0: System.out.println("Test using " 		  
		+"MidiSystem.getSequence(File)"); break;
	    case 1: System.out.println("Test using "
		+"MidiSystem.getSequence(InputStream)"); break;
	    case 2: System.out.println("Test using "
		+"Sequencer.setSequence(InputStream)"); break;
	}
    
	Sequencer s = null;    
	if (TEST_METHOD==2) {
	    s = MidiSystem.getSequencer();
	    s.open();
	}

	for (int i=0; i<args.length; i++) {
	    String    filename = args[i];
	    File    midiFile = new File(filename);
	    if  (!midiFile.exists()) {
		continue;
	    }
	    System.out.print(""+i+": "+filename+"...");
	    total++;
	    try {
		//MidiFileFormat mff = MidiSystem.getMidiFileFormat(midiFile);
		if (TEST_METHOD == 0) {
		    Sequence seq = MidiSystem.getSequence(midiFile);
		}
		if ((TEST_METHOD == 1) || (TEST_METHOD == 2)) {
		    BufferedInputStream bis = 
			new BufferedInputStream(new FileInputStream(midiFile));
		    if (TEST_METHOD == 1) {
			Sequence seq = MidiSystem.getSequence(bis);
		    } else {
			s.setSequence(bis);
		    }
		}
		succ++;
		System.out.println("OK");
	    } catch (Exception e) {
		System.out.println("FAILED:"+e.toString());
	    }
	}
	if (TEST_METHOD==2) {
	    s.close();
	}
	System.out.println(""+succ+"/"+total+" successful."
		+" Failed:"+(total-succ));
	long duration=System.currentTimeMillis()-startTime;
	System.out.println("Duration: "+(duration / 1000)+"s "
		+(duration % 1000)+"ms");
	System.exit(0);
    }
}