Why i can not upgrade 1.7.2+debian-1ubuntu1~ubuntu12.04.

[Royal Wang]

An update to libjs-jquery from 1.7.1-1ubuntu1 to 1.7.2+debian-1ubuntu1~ubuntu12.04.1 is needed.
However, this update could not be installed! Try the update manually
using the Package Updates module.

[poloshiao]

Change the download server to the mirror in this page.
https://launchpad.net/ubuntu/+archivemirrors
Choose the one with green color word in the last column.
This page shows you how to change the download server.
http://blog.gslin.org/archives/2011/02/ ... rror-site/
Then from terminal
sudo apt-get update
sudo apt-get upgrade