FULL PRODUCT VERSION :
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b147)
Java HotSpot(TM) 64-Bit Server VM (build 21.0-b17, mixed mode)

FULL OS VERSION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
Create a JFileChooser with System Look and Feel, the "Up One Level" does not browse the parent directory (if any).
It can always be reproduced in x86 and x64 Windows platform.

THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Yes

THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Yes

REGRESSION. Last worked in version 6u26

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public static void main(String[] args) {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
new JFileChooser().showOpenDialog(null);
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Use default LAF.