Tested following binary to verify 6581817 fix and found problem.
On Windows 2000 pro, Japanese, the update dialog displays garbled text. Please refer to attached screenshot.
On Windows XP pro, Japanese, the same dialog is rendered fine.
1. Install 6u2 from java.com (get java auto install).
2. Set HKLM\software\Javasoft\Java Update\Policy\UpdateServletURL registry (string) value to map.xml file: http://java-g11n.sfbay/j2se/6u3/l10n/jupdate/map-locale.xml
3. Copy http://j2se.east.sun.com/~rkaja/jucheck.exe to your locale machine and run it to get the update dialog.
On XP zh_TW (multilingual), the dialogs are garbled when locale.xml sets xml:lang="zh" for S.Chinese. When it's set to "zh_CN", English message is displayed. The section of xml:lang="zh_TW" is skipped and not used. According to ###@###.###, in zh_TW environment, it will pick up zh message, which needs to be fixed.
On XP zh (multilingual), the dialogs are also garbled when locale.xml sets xml:lang="zh" for S.Chinese. When it's set to "zh_CN", English message is displayed.