Comment 99 for bug 431217

Jean-Baptiste - I tried your instructions and it fails for the same reason the ttf-mscorefonts-installer fails: ubuntu does not honor the proxy settings for certain use cases, like this.

Even though I have a proxy clearly defined, and it's used most of the time, i.e. web access and straight-up usage of synaptic, netstat -tn while the ttf-mscorefonts-installer is hanging shows that it dumbly ignoring the system proxy settings and trying to connect directly to the internet, which of course fails every time.

The add-apt-repository command fails for the same reason: it does not honor the system proxy setting.