In the BTS:USD market, there is a sell order for 286.643 and multiple buy orders ranging from 270 to 280, however the sell order is not getting filled. I've got to say I'd cringe if I had to explain that to someone right now. From my standpoint, the guy offering to sell for 270 and the the guy offering to buy for 286 should do that deal.
Is this a bug? If not, what's the rational for not brokering the deal?