Invalid language name for 'be' language

FULL PRODUCT VERSION :
java version "1.6.0-beta2"
Java(TM) SE Runtime Environment (build 1.6.0-beta2-b86)
Java HotSpot(TM) Client VM (build 1.6.0-beta2-b86, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
Locale returns invalid language name for language 'be'.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
just execute Locale.getDisplayName():

public class test {
    public static void main(String[] args) {
        System.out.println(new Locale("be").getDisplayLanguage(new Locale("be")));
    }
}

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class test {
    public static void main(String[] args) {
        System.out.println(new Locale("be").getDisplayLanguage(new Locale("be")));
    }
}
---------- END SOURCE ----------