Unsure if this is a bug or intended behavior, but it did not show up in the patch notes for today's incremental. Either way, the Seasonal Login challenge is now showing x/999 rather than the previous x/99. It's mostly a cosmetic issue as far as I'm concerned, but I can hear the grumbles about having a challenge which cannot be completed (in anything less than about 2 years and 9 months, anyway) and am pretty sure that I am not confusing the grumbles with the other voices in my head, but there you go.