The SSL certificate for StackExchange's Imgur image host seems to have expired today. Going to https://i.stack.imgur.com/ yields this page in Chrome:
(posted on regular Imgur, for obvious reasons)
Here's a picture of the certificate details:
As the images show, the SSL certificate expired today. This is causing problems throughout all SE sites, including chat.
On the Q&A sites, load times have increased significantly (although I'm not sure how closely connected that is to the expired SSL), and most images in questions and answers won't load:
In chat, since most people use Stack Imgur to host their avatars, it's a disaster, as there are almost no images that can be loaded:
Sorry again if this is off-topic, but I wanted to announce it/ask for it to be fixed if that's possible on the SE side.
Edit: Back up! Thanks SE and Imgur for getting this resolved so quickly.