Sorry if covered already. The single is a few months old.
In any case, "Madness" seems to make a dramatic departure from Muse's typical stuff, incorporating far more house and dub-step elements than I can remember them ever having, which gives the song a dance-club element. Considering Muse has been fairly hard-rock for some time, I'm curious as to some fans' reactions. I hated it at first, but it's grown on me.
In case you haven't heard it yet, here's "Madness": LINK
And if you need a comparison, here's "Sunburn": LINK