If this is the case and you want to stay with sarge (testing) only, I propose you to remove the lines for unstable (or sid) from your /etc/apt/sources.list. That means that from now on you would not install packages from unstable. After a few days, or a few weeks, as all your unstable packages have been propagated into testing in Debian distribution, you will find yourself using only testing packages.
HTH, -- Eugen Dedu Assistant Professor / Maître de conférences http://lifc.univ-fcomte.fr/~dedu
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