wacdump reacts on special buttons, but no X events are generated

Hi,
I have an HP TC4200 TabletPC which has three soft buttons beneath the 
screen (for rotating the screen and other stuff). When i run wacdump or 
hexdump /dev/ttyS0 I can see that touching these buttons is registered. 
But under X, neither xidump nor xev notice any event. Everything else 
works fine.

I just upgraded to Kubuntu Feisty, which uses wacom-tools 0.7.7.7 (tried 
0.7.8-1 and 0.7.6-4, but same result).
I know this worked under Kubuntu Edgy; touching these buttons were 
generating events as button 9, 10 and 12.
I can't remember if I did anything special to make them work, in any 
case I didn't had to set anything specific in xorg.conf or run xsetwacom.

It would be very nice if anybody has an idea how to get these buttons to 
generate genuine X events (which I can use with xbindkeys to start 
specific programs).

Thanks,
Fritz

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