FULL PRODUCT VERSION :
Java HotSpot(TM) Client VM (build 1.6.0_02-b05, mixed mode, sharing)
And all Java6 versions

ADDITIONAL OS VERSION INFORMATION :
Linux fc7test 2.6.21-1.3228.fc7 #1 SMP Tue Jun 12 15:37:31 EDT 2007 i686 i686 i386 GNU/Linux


EXTRA RELEVANT SYSTEM CONFIGURATION :
Gnome 2.18, keyboard "Czechia"

Xorg 7.2 with following configuration:
Section "InputDevice"
        Identifier "Keyboard0"
        Driver "kbd"
        Option "XkbModel" "pc105"
        Option "XkbLayout" "cz"
        Option "XkbOptions" "grp:shifts_toggle,grp_led:scroll"
EndSection


A DESCRIPTION OF THE PROBLEM :
Pressing key "," on numpad (NumLock is ON), generates TWO events:
- java.awt.event.KeyEvent[KEY_PRESSED,keyCode=127,keyText=Delete,keyChar=',',keyLocation=KEY_LOCATION_NUMPAD]
- java.awt.event.KeyEvent[KEY_TYPED,keyCode=0,keyText=Unknown keyCode: 0x0,keyChar=',',keyLocation=KEY_LOCATION_UNKNOWN]

Effect: Deletes char at cursor position. (it is holding, when entering decimal numbers.)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
- run swing app (java -jar SwingSet2.jar)
- focus on JTextField
- type some text
- move cursor on non last position
- press ","

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Pressing key "," on numpad (NumLock is ON), should generate ONE event:
- java.awt.event.KeyEvent[KEY_TYPED,keyCode=0,keyText=Unknown keyCode: 0x0,keyChar=',',keyLocation=KEY_LOCATION_UNKNOWN]

REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
use MToolKit instead XToolKit