It seems you have python2.3 still installed. What other python packages you have installed?(you can run 'dpkg --get-selections |grep python|awk '{print $1}'|xargs dpkg --list')
How python-support handles these conflicts/problems? Maybe someone can help us.
I think that a dependency to python2.4 should be added in the ccsm package. The list of the installed python packages in your system could help us..
Bye, Emilio