Problem with IMDB-Compare
UPDATE 2019: All of the below is offline. However, IMDB themselves have similar functionality.
When you think “their HTML hasn’t changed in years”, their HTML changes. IMDB now features small images next to the author’s names. Nice to look at, but it did break IMDB-Compare. No worries, though, I’m already on it trying to fix things.
Edit: It’s fixed!