win x64 jre bundle does not install non-western locale support by default

When system locale set to Japanese, following WARNING appears and messages display garbled.

WARNING: Default charset MS932 not supported, using ISO8859-1 instead.

This problem reproduces only when used jre installed from amd64 jre bundle. Not when used jdk or 32 bit bundle. Confirmed with x64 Windows 2003 and Vista. This seems a problem from previous releases and no regression. When used JDK 6, the above warning doesn't appear but native messages will still garble.