I've removed the two problematics package and got :
file /usr/bin/kjezz from install of kdegames-2.0-6.1mdk conflicts with file
from package kdeaddutils-2.0-3mdk
file /usr/lib/libical.a from install of libical-0.20d-1mdk conflicts with
file from package libical-0.20d-1mdk
file /usr/lib/libicalss.a from install of libical-0.20d-1mdk conflicts with
file from package libical-0.20d-1mdk
file /usr/lib/libicalvcal.a from install of libical-0.20d-1mdk conflicts with
file from package libical-0.20d-1mdk
know I've decided to force the upgrade ;-0
