Hi Simon, This is a known issue. Cinepaint was removed from unstable and testing because the packaging was broken and the maintainer was MIA. I'm taking over the package and, as soon as I get the building cleaned up, will be uploading 0.22-1-1, which is a major improvement. If you can be patient a few more weeks, you'll have an installable _and_ much improved cinepaint. In the meantime, if you are able, you can get Ubuntu's source package and build it on your local machine to get some of the improvements...
Regards, -- Thanasis Kinias Doctoral Candidate, Department of History, and Instructor, Professional Enhancement Programs Arizona State University, Tempe, Arizona, U.S.A. . Je ne viens d'aucun pays, d'aucune cité, d'aucune tribu. Je suis fils de la route, ma patrie est caravane, et ma vie la plus inattendue des traversées. -- Amin Maalouf, _Léon l'Africain_