In direct links to posts, the content is stretched over the whole width of the screen.
Example: http://originaltrilogy.com/post/id/886747
Also, the first post in a topic is also stretched, but only for the signature and quote/report buttons.
Example: http://originaltrilogy.com/topic/The-Force-Awakens-Official-Review-Thread-SPOILERS/id/46786/page/1