Target platform: SLES 9 sp3 beta 1. It can reproduce on Windows and Solaris platforms.
          build: J2SE 6.0-build 59 beta
          bundle: rpm package

Problem: This is a regression. JDK 6 defines a new API to dump the information about monitors and java.util.concurrent ownable synchronizers.

Steps to reproduce:
- Install JDK 6.0-beta build 59 with the rpm package onto the system test

Note: Assume that we don't know about the new API to dump the information about monitors and concurrent ownable synchronizers that JDK 6.0-beta defines and execute the command with Local Monitoring as we ussually did in JDK 6.0 build 58 or before.
- <installed_JDK-b59-dir>/demo/management/FullThreadDump # java -jar FullThreadDump.jar

Expect result:
Print out the usage message: "Usage: java FullThreadDump <hostname>:<port>"

Actual result:
Print out the usage message above AND the exception:
"Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at FullThreadDump.main(FullThreadDump.java:96)"

Note: It seems that the usage "Usage: java FullThreadDump <hostname>:<port>" is the incorrect usage for Local Monitoring because to run the demo as a Local Monitoring, the correct command is "java -cp <JDK_HOME>/demo/management/FullThreadDump/FullThreadDump.jar Deadlock"

Detail Log:
=====================
rio:/usr/java/jdk1.6.0/demo/management/FullThreadDump # uname -a
Linux rio 2.6.5-7.216-smp #1 SMP Wed Sep 28 11:44:19 UTC 2005 i686 i686 i386 GNU/Linux

rio:/usr/java/jdk1.6.0/demo/management/FullThreadDump # cat /etc/*rel*
SUSE LINUX Enterprise Server 9 (i586)
VERSION = 9
PATCHLEVEL = 3
LSB_VERSION="core-2.0-noarch:core-3.0-noarch:core-2.0-ia32:core-3.0-ia32"
cat: /etc/lsb-release.d: Is a directory

rio:/usr/java/jdk1.6.0/demo/management/FullThreadDump # java -version
java version "1.6.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-beta-b59)
Java HotSpot(TM) Client VM (build 1.6.0-beta-b59, mixed mode, sharing)

rio:/usr/java/jdk1.6.0/demo/management/FullThreadDump # java -jar FullThreadDump.jar
Usage: java FullThreadDump <hostname>:<port>
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at FullThreadDump.main(FullThreadDump.java:96)