今天ubuntu9.10 alpha4 升級出現了點問題：
Preparing to replace language-pack-zh 1:9.10 (using .../language-pack-zh_1%3a9.10+20090805_all.deb) ...
Unpacking replacement language-pack-zh ...
Preparing to replace language-pack-zh-base 1:9.10 (using .../language-pack-zh-base_1%3a9.10+20090805_all.deb) ...
Unpacking replacement language-pack-zh-base ...
dpkg: error processing /var/cache/apt/archives/language-pack-zh-base_1%3a9.10+20090805_all.deb (--unpack):
trying to overwrite `/usr/share/locale-langpack/zh_TW/LC_MESSAGES/sed.mo', which is also in package language-pack-zh-hant-base
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Preparing to replace language-pack-gnome-zh 1:9.10 (using .../language-pack-gnome-zh_1%3a9.10+20090805_all.deb) ...
Unpacking replacement language-pack-gnome-zh ...
Preparing to replace language-pack-gnome-zh-base 1:9.10 (using .../language-pack-gnome-zh-base_1%3a9.10+20090805_all.deb) ...
Unpacking replacement language-pack-gnome-zh-base ...
dpkg: error processing /var/cache/apt/archives/language-pack-gnome-zh-base_1%3a9.10+20090805_all.deb (--unpack):
trying to overwrite `/usr/share/locale-langpack/zh_TW/LC_MESSAGES/gnome-settings-daemon.mo', which is also in package language-pack-gnome-zh-hant-base
中文的顯示是這樣：
(正在讀取數據庫 ... 系統當前總共安裝有 123909 個文件和目錄。)
正在解壓縮 language-pack-gnome-zh-hans-base (從 .../language-pack-gnome-zh-hans-base_1%3a9.10+20090819_all.deb) ...
dpkg：處理 /var/cache/apt/archives/language-pack-gnome-zh-hans-base_1%3a9.10+20090819_all.deb (--unpack)時出錯：
正試圖覆蓋“/usr/share/locale-langpack/zh_CN/LC_MESSAGES/gnome-settings-daemon.mo”，它屬于軟件包 language-pack-gnome-zh-base
dpkg-deb: 子進程 粘貼 被信號(Broken pipe)終止了
正在解壓縮 language-pack-gnome-zh-hant-base (從 .../language-pack-gnome-zh-hant-base_1%3a9.10+20090819_all.deb) ...
dpkg：處理 /var/cache/apt/archives/language-pack-gnome-zh-hant-base_1%3a9.10+20090819_all.deb (--unpack)時出錯：
正試圖覆蓋“/usr/share/locale-langpack/zh_TW/LC_MESSAGES/gnome-settings-daemon.mo”，它屬于軟件包 language-pack-gnome-zh-base
dpkg-deb: 子進程 粘貼 被信號(Broken pipe)終止了
在處理時有錯誤發生：
/var/cache/apt/archives/language-pack-gnome-zh-hans-base_1%3a9.10+20090819_all.deb
/var/cache/apt/archives/language-pack-gnome-zh-hant-base_1%3a9.10+20090819_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
類似這樣的錯誤：
dpkg: error processing /var/cache/apt/archives/AAA (–unpack):
trying to overwrite `/usr/lib/BBB‘, which is also in package CCC
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
AAA
E: Sub-process /usr/bin/dpkg returned an error code (1)
解決方法：
sudo dpkg -i --force-overwrite AAA
(give full path of AAA), and then run
sudo apt-get -f install
again.