TweetDeck.com is down, but TweetDeck still works

I ran into a bit of a surprise when I tried to log into TweetDeck today: it didn’t work.

When I started typing the word “tweetdeck” into my URL bar, my browser suggested the rest of the URL, tweetdeck.com, like I’m used to. But after I hit the Enter key, my browser unexpectedly took a few seconds to attempt to load TweetDeck and then showed me this error message on a largely blank page:

upstream connect error or disconnect/reset before headers. reset reason: connection failure