Comment 13 for bug 191475

To fix this problem:

the mimetype= line in /usr/share/applications/brasero.desktop is wrong, it should read

MimeType=application/x-cd-image;application/x-cdrdao-toc;application/x-toc;application/x-cue;application/x-brasero;x-content/blank-cd;x-content/blank-dvd;x-content/blank-bd;x-content/blank-hddvd;

currently, one of the ;'s is a :

Then a quick

sudo update-desktop-database
sudo update-mime-database /usr/share/mime

will add brasero to the blank media options.