Forum images won't show in thread in a specific forum?
 

In a specific forum, images won't show. It appears in the WYSIWYG editor, but when saving the post, the image disappears and reverts to a link that says "Attachment _____" the blank being a number. When clicked the link won't show the image but shows an error.

Other forums are allowing images to be posted just fine. What could be a setting in a specific forum that is disallowing images to be viewable in a post?