I see no images if I call the site (mobile) the Buttons are empty ...
What browser? (And maybe what resolution.)
And just to be sure you mean the main menu at the top, right?
Latest Chrome on a Nexus 7 (600 x 900)
And yes .. the first page ..
Ahhh... but that's the home page, not the forum, the forum works fine for me, while the home there seems to be a size issue.
Tweaked a bit the home.css overriding some bootstrap stuff, now it should look a bit more consistent.