Well, I moved to my "room of keyboards".
Pickup up my 1390120 and hooked it to my main PC, fired it upt.
System passed BIOS test and boot Win Xp SP2.
user login screen came up, and i entered p/w ( combination of number and alphabets.)
Now it's working fine. I'm typing this comment on 1390120 right now.
I believe every keys are working just fine.
No problem is found using Ctrl and Alt in each position right and left.
No magic was applied when I connected this board to my system.
BIOS didn't complain keyboard error and such.
XP recognized the board as usual US 101 keyboard.
andb, isn't your problem relating to Linux ?