当我sudo apt-get upgrade在 Debian Squeeze 安装上运行时，出现以下错误：
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
libxml2-dev : Depends: libxml2 (= 2.7.8.dfsg-2+squeeze3) but 2.7.8.dfsg-2+squeeze5 is installed
E: Unmet dependencies. Try using -f.
我不确定“squeeze3”与“squeeze5”的含义，但它是 libxml2 包中唯一不同的地方。
当我尝试“sudo apt-get install -f”时，我得到：
The following extra packages will be installed:
libxml2-dev
The following packages will be upgraded:
libxml2-dev
1 upgraded, 0 newly installed, 0 to remove and 8 not upgraded.
108 not fully installed or …