Imgur was taken down by their domain provider for failing to respond to abuse notices. The domain provider's CEO apologised for one of his abuse team being too heavy-handed and immediately reinstated it - but the takedown procedure included changing the nameservers with a 48 hour TTL.
So, even a day later, some DNS propagation stuff is still going on.
Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly
to your computer or smartphone by using a feed reader.