A piece of code that we have that used to work in Java 1.5/JAXP 1.3 is broken
in Java 1.6/JAXP 1.4. Here is a boiled-down version of the java code that
demonstrates the problem. The output from the java file should be "foo", but
comes out as "". The XML in question starts with a processing instruction and
no prolog, but I think the parser gets confused and treats it as the prolog but
throws away the data.. not really sure.

import java.io.*;
import org.w3c.dom.*;
import org.xml.sax.*;
import com.sun.org.apache.xerces.internal.parsers.*;

class test {
  public static void main( String[] args ) throws Exception {
    ByteArrayInputStream bais = new ByteArrayInputStream( "<?xmltarget foo?
><test></test>".getBytes() );
    DOMParser p = new DOMParser();
    p.parse( new InputSource( bais ) );
    System.out.println( ( (ProcessingInstruction)p.getDocument().getFirstChild
() ).getData() );
  }
}