User blog comment:Rupert Giles/Layout Changes: Breakpoints and Typography/@comment-24630105-20150519115708/@comment-452-20150519125836

Given Wikia's focus on mobile devices, this error seems like it should have been immediately noticed.

I assumed that they were just concentrating on testing on mobile devices, and simply didn't have time to test on desktops, but I guess they just didn't have time to test this on any platform.