xmodmap errors

[xpol]

I get errors from xmodmap at my session start. 

First lines from the .xsession-errors file: 
Xsession: X session started for pol at Mon Oct  1 07:39:27 CEST 2007
/usr/bin/xmodmap:  /usr/share/apps/kxkb/ubuntu.xmodmap:1:  bad keysym
name 'XF86Search' in keysym list
/usr/bin/xmodmap:  /usr/share/apps/kxkb/ubuntu.xmodmap:2:  bad keysym
name 'XF86MyComputer' in keysym list
/
(...)

Every line in /usr/share/apps/kxkb/ubuntu.xmodmap appears to be wrong
Same errors, as i enter the commnd
   xmodmap   /usr/share/apps/kxkb/ubuntu.xmodmap 
from a terminal.

Here are the first lines from that file

keycode 229 = XF86Search
keycode 235 = XF86MyComputer
keycode 236 = XF86Mail
keycode 237 = XF86AudioMedia
keycode 118 = XF86Music
(...)

What is wrong?

Thank you for your help
--
Pol