I'd like to backup the favorites of my Tumblr user account. They are publicly accessible (at tumblr.com/liked/by/<USERNAME>; can be (de)activated in the Dashboard settings). There is a backup ...
What is currently the de-facto way of backing up Tumblr tumblelogs? I have "backstage" access to Backupify's Tumblr service, but (as they forewarned) it's not all too stable.