closed/javax/swing/JFileChooser/6484091/bug6484091.java fails on solaris 10 sparc

Bug Info
=========
closed/javax/swing/JFileChooser/6484091/bug6484091.java fails with the following exception on solaris 10 sparc platform and there is no issue on windows and linux platforms.

java.lang.ClassCastException: javax.swing.filechooser.FileSystemView$FileSystemRoot cannot be cast to sun.awt.shell.ShellFolder
at bug6484091.main(bug6484091.java:16)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:623)
at com.sun.javatest.regtest.MainWrapper$MainThread

JDK Info
=========
java version "1.7.0-internal"
Java(TM) SE Runtime Environment (build 1.7.0-internal-administrator_2009_06_01_0
1_18-b00)
Java HotSpot(TM) Client VM (build 16.0-b03, mixed mode, sharing)

Steps to reproduce
===================
Set the following envrionment and run the test.

1. Set JTREG PATH
2. Set JDK HOME
3. Set WORK DIR and REPORT DIR
4. Set the SUITE(ex: SUITE=/net/sqindia.india/export/disk01/vinay/src/jdk/test/cclosed/javax/swing/JFileChooser/6484091/bug6484091.java)
5. Run the following command once set the above environment.
ksh ${JTREG_PATH}/bin/jtreg -v -jdk:${JDK_HOME} -r:${REPORT_DIR} -w:${WORK_DIR} ${SUITE}

Please find the attached test log for more details.