Keys misbehaving in GUI

[H.S.Rai]

Strange behaviour observed. On latest Ubuntu 10.10 updated, when I
login as a particular user in GUI, most of keys towards right half of
keyboard start misbehaving. Many keys don't produce any action, some
make cursor to move. I checked keyboard layout, it is not changed.

If I login in Console mode, it is OK.

For other users, it is OK.

Can it be virus?

How I can find problem, or how I can correct it / restore to original one.

-- 
H.S.Rai