Yesterday we reported Google was indexing itself and Google caught wind of it and Gary from Google commented on my Google+ post telling me they are looking into it.
Last night at around 6pm EDT, Google updated their robots.txt file to block the search results from being indexed.
Hacker News picked up on it as well, and yesterday before 6pm, it looked like this:
Now it looks like this:
Even Google makes mistakes I guess.
Forum discussion at Hacker News and Google+.