I'm in the same situation with Kohei. My system is debian lenny, amd64 and locale is ja_JP.UTF-8.
The same error has occurred when updating addons. I found what is wrong. Simply URL is wrong. In my situation, Iceweasel Add-on Manager searches https://addons.mozilla.jp/firefox/ and tries to install same domain. But addons.mozilla.jp does not have xpi files and they are in such URL as https://addons.mozilla.org/ja/firefox/addon/xxxx . --- Kitani yu...@waterblue.net -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org