Bug#405279: apt: can't get preferences to work correctly

[Julian Gilbey <jdg@debian.org>]

Package: apt
Version: 0.6.46.4

I'm running a testing distribution.  I've got
www.debian-multimedia.org in my sources.list, but I want the Debian
version of mplayer to be used in preference to the debian-multimedia
version.

In my sources.list I have:

deb http://ftp.uk.debian.org/debian/ testing main contrib non-free
deb http://www.debian-multimedia.org testing main
[...]


In my /etc/apt/apt.conf I have the single line:

APT::Default-Release "testing";

and there's nothing relevant in /etc/apt/apt.conf.d/ .

In my /etc/apt/preferences I have:

Package: *
Pin: origin "www.debian-multimedia.org"
Pin-Priority: 50

Package: *
Pin: release a=unstable
Pin-Priority: 60

But it doesn't work: it always tries to download the
www.debian-multimedia.org version (which has a higher version number
than the debian.org one).

The output of apt-cache policy includes:

 990 http://www.debian-multimedia.org testing/main Packages
     release o=Unofficial Multimedia Packages,a=testing,l=Unofficial Multimedia Packages,c=main
     origin www.debian-multimedia.org


What am I doing wrong?  Or is it a bug in APT?

Thanks,

   Julian