Label displays garbled on RHEL 5

Please refer to attached screenshot [CharView_RH5.png]. You can see the garbled labels displayed. When run this same test on RedHat 4, not 5, it will render okay as in another screenshot [CharView_RH4.png].
In order to reproduce, please follow below steps.

$ cp /net/sqe1.sfbay/quality2/i18n/workspaces/archive/i18n_ws/OverSea/Japan/FJ/fj-test.tar .
$ tar xf fj-test.tar ./fj_new/kison_1/awt
$ cd !$
$ java CharView
choice font size larger than 20.
select "Label" then you should see the problem. If not, please try some variation.

Original testcase: http://tula.red.iplanet.com/tcm2/tcm_testcase.cgi?tcm_config=java&action=query_testcase&product_id=2&category_id=39

Tested environment:
[root@bols ~]# uname -a
Linux bols.japan.sun.com 2.6.18-8.el5 #1 SMP Fri Jan 26 14:15:14 EST 2007 x86_64 x86_64 x86_64 GNU/Linux
[root@bols ~]# more /etc/redhat-release
Red Hat Enterprise Linux Server release 5 (Tikanga)
[root@bols ~]# java -version
java version "1.6.0_02-ea"
Java(TM) SE Runtime Environment (build 1.6.0_02-ea-b01)
Java HotSpot(TM) 64-Bit Server VM (build 1.6.0_02-ea-b01, mixed mode)