FULL PRODUCT VERSION :
java version "1.6.0_10-rc"
Java(TM) SE Runtime Environment (build 1.6.0_10-rc-b28)
Java HotSpot(TM) Client VM (build 11.0-b15, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP

A DESCRIPTION OF THE PROBLEM :
According to the evaluation of bug 4486063, in MetalLookAndFeel, the open button of JFileChooser dialog should not have mnemonics.
In zh_CN an ja locale, the text of open button has an unnecessary "(O)" surfix, when user select a directory.
Although the "O" is not underlined, user may still be confused to press Alt+O , trying to open selected directory.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Use "java -Duser.language=ja -jar SwingSet2.jar" to launch SwingSet2 demo app, select "java LookAndFeel", select JFileChooser demo, open a filechooser dialog, select any directory, the text of open button appends an unnecessary "(O)" surfix.


REPRODUCIBILITY :
This bug can be reproduced always.