mysterious orders to buy and sell 2812 shares

This is the market depth at the end of today's trade (25/6/12).

Does anyone understand what are all these sell (and buy) orders for 2812 shares ????

Also what are we supposed to make of these ???

They are in sell queue at 0.38, 0.385, 0.39, 0.395, 0.40 (12812), 0.405 and
similarly for the buy queue at 0.36 (62812), 0.35, 0.345,0.34 (52812), 0.335

They are virtually the only orders in the queues.