As Sylvain said, pyro4 breaks the abi and therefore this upgrade breaks any application deployed on the system depending on pyro 3.x.
The best move imo would be to keep pyro4 in experimental, since most users are using the official stable release (3.x branch), and reverting to pyro3 in sid/testing. I suggest providing 2 packages pyro and pyro4, which could at first conflict with each other. I think upstream should be contacted, and asked to change the namespace of pyro 4.x to pyro4 in order to ease parallel installation of both versions. In any case, please do not release squeeze with pyro 4.x as "pyro". This will be very painful. We really want pyro 3.9 in squeeze, as 4.x will break external applications. I'll be happy to help on this matter once -- Alexandre Fayolle LOGILAB, Paris (France) Formations Python, CubicWeb, Debian : http://www.logilab.fr/formations Développement logiciel sur mesure : http://www.logilab.fr/services Informatique scientifique: http://www.logilab.fr/science -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org