lftp cannot be authenticated

包子

今天公司要测试产品，我趁机抓了个ubuntu 610回来玩玩，安装界面十分之cool
不过在我upgrade的时候出现lftp无法验证，pgpkey我已经导入了的，换了其他的源也是一样，如果remove掉lftp的话,ubuntu-desktop也会被删除，有没人遇到类似的情况的啊？

root@ubtest:~# apt-key add /usr/share/apt/ubuntu-archive.gpg
OK

root@ubtest:~# apt-get upgrade -y
Reading package lists... Done
Building dependency tree      
Reading state information... Done
The following packages have been kept back:
  gaim gaim-data
The following packages will be upgraded:
  avahi-daemon capplets-data dbus dbus-1-utils evince firefox firefox-gnome-support gdm gimp gimp-data gimp-python gnome-applets
  gnome-applets-data gnome-control-center gnome-games gnome-games-data gnome-netstatus-applet gnome-panel gnome-panel-data
  gnome-system-tools gnupg info initramfs-tools language-pack-en language-pack-gnome-en language-pack-gnome-zh language-pack-zh
  lftp libavahi-client3 libavahi-common-data libavahi-common3 libavahi-core4 libavahi-glib1 libc6 libc6-i686 libdbus-1-3
  libgimp2.0 libgnome-window-settings1 libgnomeprintui2.2-0 libgnomeprintui2.2-common libgnomevfs2-0 libgnomevfs2-bin
  libgnomevfs2-common libgnomevfs2-extra libgsf-1-114 libgsf-1-common libgtk2.0-0 libgtk2.0-bin libgtk2.0-common libmagick9
  libmono-cairo1.0-cil libmono-corlib1.0-cil libmono-data-tds1.0-cil libmono-security1.0-cil libmono-sharpzip0.84-cil
  libmono-sqlite1.0-cil libmono-system-data1.0-cil libmono-system-web1.0-cil libmono-system1.0-cil libmono0 libmono1.0-cil
  libnspr4 libnss3 libpanel-applet2-0 libpng12-0 libtotem-plparser1 libvolumeid0 linux-headers-2.6.17-10
  linux-headers-2.6.17-10-generic linux-image-2.6.17-10-generic linux-restricted-modules-2.6.17-10-generic
  linux-restricted-modules-common mono-common mono-gac mono-jit mono-runtime openoffice.org openoffice.org-base
  openoffice.org-calc openoffice.org-common openoffice.org-core openoffice.org-draw openoffice.org-evolution openoffice.org-gnome
  openoffice.org-gtk openoffice.org-impress openoffice.org-java-common openoffice.org-math openoffice.org-style-default
  openoffice.org-style-industrial openoffice.org-writer python-uno screen synaptic system-tools-backends tar totem totem-gstreamer
  totem-mozilla ttf-opensymbol tzdata udev vino volumeid w3m x11-common xbase-clients xorg xserver-xorg xserver-xorg-core
  xserver-xorg-input-all xserver-xorg-video-all xutils
113 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
Need to get 179MB of archives.
After unpacking 4740kB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
  lftp
E: There are problems and -y was used without --force-yes


Package: lftp
Version: 3.5.6-1~6.10mlk1
Priority: optional
Section: net
Maintainer: No<C3><A8>l K<C3><B6>the <noel@debian.org>
Depends: libc6 (>= 2.4-1), libgcc1 (>= 1:4.1.1-12), libgcrypt11 (>= 1.2.2), libgnutls13 (>= 1.4.0-0), libgpg-error0 (>= 1.2), libncu
rses5 (>= 5.4-5), libreadline5 (>= 5.1), libtasn1-3 (>= 0.3.4), zlib1g (>= 1:1.2.1), netbase
Architecture: i386
Filename: dists/edgy/main/binary-i386/media/lftp_3.5.6-1~6.10mlk1_i386.deb
Size: 533794
Installed-Size: 1237
MD5sum: 63f0cdaa9b87d90f398624b1f4e7a297
Description: Sophisticated command-line FTP/HTTP client programs
Lftp is a file retrieving tool that supports FTP, HTTP, FISH, SFTP, HTTPS
and FTPS protocols under both IPv4 and IPv6. Lftp has an amazing set of
features, while preserving its interface as simple and easy as possible.
.
The main two advantages over other ftp clients are reliability and ability
to perform tasks in background. It will reconnect and reget the file being
transferred if the connection broke. You can start a transfer in background
and continue browsing on the ftp site. It does this all in one process. When
you have started background jobs and feel you are done, you can just exit
lftp and it automatically moves to nohup mode and completes the transfers.
It has also such nice features as reput and mirror. It can also download a
file as soon as possible by using several connections at the same time.
.
Lftp can also be scriptable, it can be used to mirror sites, it lets you
copy files among remote servers (even between FTP and HTTP). It has an
extensive online help. It supports bookmarks, and connecting to several
ftp/http sites at the same time.
.
This package also includes lftpget - A simple non-interactive
tool for downloading files.
.
http://lftp.yar.ru/
.
This version was packaged as a backport for the stable
Ubuntu "Edgy Eft" distribution (http://www.ubuntu.com)

ctqucl

ubuntu-desktop 是个空包，起关联作用的，如果少了关联的任何一个包，它都会被删除，但是不影响使用。

包子

多谢ctqucl啊
我已经--force-yes安装了，反正这个测试机也不用lftp，想想关系不是太大