I got this error after using one of the askubuntu articles to install skype on my ubuntu:
Data files for some packages could not be downloaded The following packages requested additional data downloads after package installation, but the data could not be downloaded or could not be processed. ttf-mscorefonts-installer This is a permanent failure that leaves these packages unusable on your system. You may need to fix your Internet connection, then remove and reinstall the packages to fix this problem.
This may have been a result of the errors I got on Errors with Installing Skype on Ubuntu 14.04, which I still haven't received an answer for.
Should I do anything? The error is alarming.
Also, I'm not so sure that this is because of Skype, but putting 2 and 2 together, it seems likely.