The British Museum has had its share of problems in the past few years. No sooner had it finished its own Millennium project, the brittle, echoing Norman Foster-designed Great Court with its virtuoso spiralling glass roof, than it ran spectacularly and publicly short of money. All kinds of doom and gloom were predicted. The temptation must have been to slap on all kinds of populist, crowd-pulling entertainments. Maybe there is a hint of that in the new "Buried Treasure" show. But elsewhere, they have dumbed up. The latest new gallery at the BM, costing £8 million, is indeed state of the art. But there is no condescension here. It looks like state of the art, circa 1827.