Great work Slávek, thanks for the Squeeze debs. All good here.

# apt-get update
# /etc/init.d/kdm-trinity stop
# apt-get dist-upgrade

Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
   ark-trinity kaddressbook-trinity kappfinder-trinity karm-trinity
   kate-trinity kcalc-trinity kcontrol-trinity kdebase-data-trinity
   kdebase-kio-plugins-trinity kdebase-runtime-data-common-trinity
   kdebase-trinity kdebase-trinity-bin kdelibs-data-trinity 
kdelibs4c2a-trinity
   kdepasswd-trinity kdeprint-trinity kdesktop-trinity kdf-trinity 
kdm-trinity
   kfind-trinity kget-trinity khelpcenter-trinity kicker-trinity
   klipper-trinity kmenuedit-trinity knotes-trinity 
konqueror-nsplugins-trinity
   konqueror-trinity konsole-trinity korganizer-trinity kpager-trinity
   kpersonalizer-trinity kregexpeditor-trinity ksmserver-trinity
   ksplash-trinity ksysguard-trinity ksysguardd-trinity ktip-trinity
   kwin-trinity libkcal2b-trinity libkdepim1a-trinity libkleopatra1-trinity
   libkmime2-trinity libkonq4-trinity libkpimexchange1-trinity
   libkpimidentities1-trinity libktnef1-trinity libqt3-mt libssl0.9.8
   libtqt3-integration-trinity libxml2 openssl sudo
53 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 81.0 MB of archives.
After this operation, 205 kB of additional disk space will be used.