The update has been in effect for a while, no? I got the "Out of Love" badge last week... http://forums.tumult.com/badges/33/out-of-love
It's real easy to get too. There are so many nice posts to like. Such as the ones here...
Since I haven't been posting here as much as I used to, I simply went back and started liking a bunch of posts as I started reading. I liked way more than 50 in one day, so I don't think 50 is a limit. The wording of the badge seems slightly different than what happened.
I didn't see much of a difference in the font. Maybe it's because I'm using an iPad.