I have experienced several positioning problems with the linux client :
Problem 1
- playing with 2 machines on on XP, the other on ubuntu 8.04.
- position in range on ubuntu shows 1 or 2 spaces difference on xp screen
- of course no hit on the ubuntu machine
- watching the xp screen shows the "real" sprite position
- sorry no prtscrn of it...
Problem 2
- same as before but only 1 machine
- prtscrn availables and attached
this happens on all the maps.
Hope this helps

regards,
grptrk