debian:/home/darren# apt-cache policy audacious-plugins
audacious-plugins:
  Installed: 1.4.5-1
  Candidate: 1.5.0-1
  Version table:
     1.5.0-1 0
        500 http://ftp.jp.debian.org unstable/main Packages
        500 http://ftp.kr.debian.org unstable/main Packages
 *** 1.4.5-1 0
        500 http://debian.cn99.com unstable/main Packages
        100 /var/lib/dpkg/status
------------------------------------

debian:/home/darren# apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be upgraded:
  audacious audacious-plugins audacious-plugins-extra deluge-torrent deluge-torrent-common eog libhyphen0 strace
8 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/8469kB of archives.
After this operation, 463kB disk space will be freed.
Do you want to continue [Y/n]? y
E: Couldn't configure pre-depend audacious-plugins for audacious-plugins-extra, probably a dependency cycle.