As per the main meta post - there's a risk of images hosted on the 'main' imgur instance (as opposed to the stack exchange one) being deleted due to changes in their TOS. Images uploaded anonymously will be deleted, and there's no real way to check which images fall under that.
There's only 21 posts that need going through and fixing according to SEDE - there may be some disruption to the front page as these are fixed.
Some of these need resizing, and I'm not sure what to do with some of the gifs yet, since its not a simple upload - so its best effort first.
If you want to assist in fixing it - let us know, and if you're a user with only suggested edit abilities and the edits are not validated, you can generally find me or other users in the site chatroom to assist. Considering the number of posts, going slow ought to be fine however and there's no rush to get these fixed.