FULL PRODUCT VERSION :
java version "1.6.0-ea"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-ea-b57)
Java HotSpot(TM) Client VM (build 1.6.0-ea-b57, mixed mode, sharing)


ADDITIONAL OS VERSION INFORMATION :
Linux localhost 2.6.12-12.mm.3mdkenterprise #1 SMP Mon Sep 26 22:52:19 CEST 2005 i686 AMD Athlon(tm) XP 2800+ unknown GNU/Linux


EXTRA RELEVANT SYSTEM CONFIGURATION :
Section "InputDevice"
    Identifier "Keyboard1"
    Driver "kbd"
    Option "XkbModel" "pc105"
    Option "XkbLayout" "fi"
    Option "XkbOptions" ""
EndSection


A DESCRIPTION OF THE PROBLEM :
I've tested this only with jEdit 4.2final but there seems to be clear difference to running older java versions. If I press CTRL+ALT+o I get following results in jEdit "Keyboard tester" (in Utilities - Troubleshooting):

Event KEY_PRESSED,keyCode=0x11,keyChar=0xffff,modifiers=0x2 filtered
Event KEY_PRESSED,keyCode=0x12,keyChar=0xffff,modifiers=0xa filtered
Event KEY_PRESSED,keyCode=0x4f,keyChar=0x6f,modifiers=0xa passed
==> Translated to CA<0,6f>
Event KEY_TYPED,keyCode=0x0,keyChar=0x6f,modifiers=0xa passed
==> Translated to <0,6f> XXX
Event KEY_RELEASED,keyCode=0x4f,keyChar=0x6f,modifiers=0xa passed
Event KEY_RELEASED,keyCode=0x12,keyChar=0xffff,modifiers=0x2 filtered
Event KEY_RELEASED,keyCode=0x11,keyChar=0xffff,modifiers=0x0 filtered

A related problem is that if I press CTRL+ALT+o, I get the above results, if I keep ALT pressed and release CTRL and o and press o again (expecting to get ALT+o as a result) I get ALT+o followed by o. Instead, if I release all keys and press ALT+o I get only single event.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1) Press CTRL+ALT+o
2) examine generated events
3) Keep ALT pressed, release CTRL and o
4) Press o (generating ALT+o)
5) examine generated events
6) release all keys
7) press ALT+o
8) compare results to step 5

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
In step 2 I would expect CTRL+ALT+o, no event for a plain o.
In step 5 I would expect ALT+o, no event for a plain o.
Step 8 should be identical to step 5.

ACTUAL -
In step 2 CTRL+ALT+o AND o
In step 5 ALT+o AND o
Events in step 8 are different from step 5.


REPRODUCIBILITY :
This bug can be reproduced often.