Comment 2 for bug 1364879

Got that popup again today, after a cold boot and updating/upgrading from synaptic:

Failure to download extra data files

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

The download will be attempted again later, or you can try the download again now. Running this command requires an active Internet connection.

Could it be the mandatory "EULA" request not checked ? (that pc have already accepted that EULA when wine1.7 have been used with some apps requiring mscorefonts)