When I go to a thread it's displayed weird. Not posts but it looks like an email group. I've changed nothing in my settings and all threads look like this suddenly. Some replies I click on take me to a page saying it's missing files to show the post.

Top right corner, under New Topic, click Options and see if it is set to Standard.

I only have things to mark as read, mark as new, etc, and only on the main forum sections, not on the threads. I'll try to get a screen shot.

Try what I told you, it will fix it.

It's under Search.

Found it, thank you. No idea what happened, I didn't change any settings myself.

It will change itself sometimes if you click on a link to the forum from Google when you're searching for something. Otherwise, no idea why it could've changed.

That's exactly what happened!