Pinning doesn't work for the debian experimental archive.

Binary package hint: apt

# cat /etc/apt/apt.conf
APT::Default-Release "9.10";

# cat /etc/apt/preferences
Package: hugin
Pin: release a=experimental
Pin-Priority: 1000

# apt-cache policy hugin
hugin:
  Installed: (none)
  Candidate: (none)
  Package pin: (not found)
  Version table:
     2009.2.0+dfsg~rc1-1 1000
        500 http://ftp.debian.org experimental/main Packages
     0.7.0-2ubuntu1 1000
        990 http://ubuntu.media.mit.edu karmic/universe Packages
        100 /var/lib/dpkg/status

Note, in particular, the "Package pin: (not found)".

If I change "experimental" to "karmic" it works fine:

# apt-cache policy hugin
hugin:
  Installed: (none)
  Candidate: 0.7.0-2ubuntu1
  Package pin: 0.7.0-2ubuntu1
  Version table:
     2009.2.0+dfsg~rc1-1 1000
        500 http://ftp.debian.org experimental/main Packages
     0.7.0-2ubuntu1 1000
        990 http://ubuntu.media.mit.edu karmic/universe Packages
        100 /var/lib/dpkg/status

I'm trying to test the debian experimental hugin package to get it moved to debian sid to sync to lucid.

ProblemType: Bug
Architecture: i386
Date: Sat Oct 3 14:00:28 2009
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: nvidia
Package: apt 0.7.23.1ubuntu1
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-11.38-generic
SourcePackage: apt
Uname: Linux 2.6.31-11-generic i686
XsessionErrors:
 (gnome-settings-daemon:1967): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:1967): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (polkit-gnome-authentication-agent-1:2017): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (nautilus:2001): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed