For some reason, Stack Overflow, The Workplace, Computer Science, and Libraries and Information Science started showing up as having 0 questions, 0 answers, NaN% answered with 0 users in the StackExchange.com/sites page.
Meta Stack Exchange is a question and answer site for meta-discussion of the Stack Exchange family of Q&A websites. It only takes a minute to sign up.Sign up to join this community
We had some very unexpected behavior from upgrading the JSON serializer which wasn't actually deployed until APIv2 was built today...for a few minutes it was throwing some very unfriendly JSON with surprise properties.
That's been corrected (reverted) and the cache has expired on stackexchange.com, so all should be well now.