yesterday evening, I did a complete upgrade using dist-upgrade from chomodoris to dasyatis to see the current state of development.
The upgrade did not work flawlessly, because when installing partitionmanager it said that it requires libkpmcore1 which is not going to be installed. In chomodoris it did not require libkpmcore, maybe this caused the problem.
I then forced the installation by sudo apt-get install -f and everything worked properly after that. We should probably fix that before a final release of dasyatis.