I have no idea if I'm just stupid or something or maybe this is a bug, but is there some kind of filetype requirement or anything for forum images now? No matter what I do it's not working for me. I just get a message saying that it's not a valid image, but there's nothing wrong as far as I can tell. The link is good and everything. Its always worked before.

is it from imgur? imgur links are no longer working for forum images, unfortunately. you can still embed them in posts afaik, but not forum images. the reason is still unknown.

in the meantime, you can reupload the image to an alternative host—i've used tinypic in the past, but i'm not sure if it's still any good. flickr might be alright. there are lots of others you can find through searching, but i'm not familiar with any of them so i can't tell you much about them.

Yeah, that'll be it. I wonder why that's a thing. Thanks for the help!