FULL PRODUCT VERSION :
java version "1.6.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-rc-b65)
Java HotSpot(TM) Client VM (build 1.6.0-rc-b65, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
I have seen this on Win XP and Solaris x64.

A DESCRIPTION OF THE PROBLEM :
Basically whenever I am starting any application that has a Hibernate 3.1
(http://www.hibernate.org) XML mapping. I get the following output to the console at runtime:

XMLScanner#scanComment#c == 60
XMLScanner#scanComment#text.toString() == Hibernate Mapping DTD

for every mapped class.

This behavior is not present on 1.5, and it completely goes away on 1.6 if I override the XML parse with the latest version of Xerces through "endorsed" directory.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Look in the source of

com.sun.org.apache.xerces.internal.impl.XMLScanner

Lines 748, 749 contain:

System.out.println( "XMLScanner#scanComment#text.toString() == " + text.toString() );
System.out.println( "XMLScanner#scanComment#c == " + c );

Those should obviously be removed. :-)

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No console output.
ACTUAL -
XMLScanner#scanComment#c == 60
XMLScanner#scanComment#text.toString() == Hibernate Mapping DTD

REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
change the XML parser through supplying a new one in the jre/lib/endorsed dir.