javax/swing/filechooser/FileNameExtensionFilter/UnitTest/UnitTest.java fails on winxp platform.

Bug Info:
=========
javax/swing/filechooser/FileNameExtensionFilter/UnitTest/UnitTest.java fails on winxp platform with RuntimeException.


JDK Info:
=========
java version "1.6.0-swing_int_jcg_win_03"
Java(TM) SE Runtime Environment (build 1.6.0-swing_int_jcg_win_03-java2d_03_may_2006_12_03-b00)
Java HotSpot(TM) Client VM (build 1.6.0-beta2-b82, mixed mode)

Test Source Location:
=====================
/net/sqindia.india/export/disk11/swing/mustangbinaries/PIT.04.May.2006/test/javax/swing/filechooser/FileNameExtensionFilter/UnitTest/UnitTest.java

Steps to Reproduce:
===================
1. Set JAVA_HOME to PIT b84.
2. cd /net/sqindia.india/export/disk11/swing/mustangbinaries/PIT.04.May.2006/test/javax/swing/filechooser/FileNameExtensionFilter/UnitTest
3. /net/koori.sfbay/onestop/jct-tools/2.1.6/archive/fcs/binaries/win32/bin/jtreg -r:/tmp -w:/tmp ./UnitTest.java

Please check the attached jtr file for exception details.