Size mismatch erro

[xxsmarty]

When i try to install updates from update managerin ubuntu 11.10 it says :
Failed to download package files
Check internet connection


Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-image-3.0.0-13-generic_3.0.0-13.22_i386.deb Size mismatch




What is this Size mismatch error ! Please help!!

And when i typed sudo apt-get upgrade in terminal
it says:


Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/libr/libreoffice/libreoffice-core_3.4.4-0ubuntu1_i386.deb Size mismatch
Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/x/xserver-xorg-video-intel/xserver-xorg-video-intel_2.15.901-1ubuntu2.1_i386.deb Size mismatch




Please give the solution to the problem.

[Hakunka-Matata]

Have you tried this?




sudo apt-get install -f
sudo apt-get update --fix-missing