Using the default (blue/white) background, instead of a bar at the top and bottom of the page, it instead has a vertical list.
For example, at the top "home" is in an orange bar, but all the other options ("Forum", "Blog", "Help", etc.) are listed underneath "Home", each on its own line, rather than in the bar itself.
Same thing for the "Reply" bar at the bottom.
Inquisitor Muppetologis Ruminahui