This could be a bandwidth/speed issue. Our badge pages aren't very efficient. This one in particular is getting slower because almost 33,000 people have the badge. It could be that we crossed a threshold here and it just happened to coincide with the design change. But ... I'm not sure that would explain why going directly to these URLs works for you, but paging forward or backward does not. And I would expect the loading of the previous/next page to eventually time out, so you'd see an error. I'll see if I can look into this some more.
Again, my apologies for the trouble. Your Greeting is much appreciated. Maybe until we fix this you could go directly to URLs, by manually changing the "limit" and "start" numbers? Let me know if you need more explanation on that.