Comment 11 for bug 979477

This also affects ubuntu raring 13.04 amd64 (i did a clean install). Simple fix (since many past distributions) has been to do the following:

sudo su
export http_proxy=http://username:password@proxyhost:port
apt-get install --reinstall ttf-mscorefonts-installer

I dont know why this still affects raring, as the status of this bug report is "fix released".