Re: Gnome 3.8

Sur la page dédiée, on trouve cette explication :

For several reasons, the security support for testing cannot be expected to be of the same quality as for Debian's stable branch:

Updates for testing-security usually receive less testing than updates for stable-security.
Testing is changing all the time which increases the likelihood of problems with the build infrastructure. Such problems can delay security updates in testing.

http://secure-testing-master.debian.net/

Donc effectivement, si tu veux un système bien sécurisé, il faut prendre stable, la version testing fournit toutefois un système assez bien sécurisé.