En réponse à Josselin Mouette <josselin.mouette@ens-lyon.org>: > As libpng12-dev provides libpng12-0-dev, and there are no versioned > dependencies on it, there is no breakage. apt-get install libqt3-mt-dev doesn't work because it cannot install libpng12-0-dev despite what you are saying. -- Jérôme Marant