gnome-screensaver has oviously changed. You'll probably also find that DPMS isn't working unless you upgrade to gnome-power-manager 2.26 (currently in experimental).
I think it will be up to the VLC developers to support the new version of gss. Please could you reassign this bug to vlc. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org