I'm puzzled too, Omers. I looked at that one thread, and it turned out that the images you apparently couldn't see were all smilies from the usual PC collection. I'm not sure if there's a control anywhere for enabling and disabling smilies. Weirder still, when I tried disabling the "images in posts and attached images", I could still see smilies, avatars, and album pictures included in posts.

Is there any possibility that your browser or computer could be playing tricks? Do you see other images besides smilies and photos in posts? Here's a copy of the PC logo:

Does it show up here? How about in the top left corner of the page where you're reading this?

How about this?

It's one of the smilies you couldn't see before but I'm inserting it here as a .gif image, not by the usual insert-a-smiley route.

And by the way, even though I should still have images disabled, I do see those two at least in Preview.