I would like to have a recipe for deploying from the svn checkout of the dev (or any branch) branch. The idea here is to be able to avoid waiting for the nightly tarball to test fixes.
HOWEVER: I do not recommend deploying from the SVN. There is a subtile distinction. SVN deployments are marked as "developmental" where as Nightly builds are marked as "released" and Zenphoto does behave differently in a developmental environment--it includes debugging code.
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http://www.zenphoto.org/news/translating-tutorial#updating_zenphoto