If you missed the first day of this four-day, eight-game rapid match in Hungary you didn't miss too much. Carlsen drew the first game with black using the Dragon he played against Karjakin in the recent Baku Grand Prix. Can anyone remember who said, apropos its Anand-Kasparov appearance, I believe, that "you can't play for a win against the Dragon without playing g4"? Something like that. Leko made a little progress, winning a pawn, but couldn't get further against Black's superior activity. In the second game Carlsen played the offbeat 5.Nc5 against Leko's Caro-Kann. He'd played this last year against Pedersen. Fischer played this move a few times in simuls (as have Kasparov and Kramnik) while the ever-creative David Bronstein tried it against Petrosian and Beliavsky. Carlsen didn't seem to get much against Leko, but allowing a threefold repetition on move 18 was pretty limp.
Leko's record in these matches is even. He drew with Adams in 2005, beat Karpov 4.5-3.5 in 2006, and lost to Kramnik by the same score last year. The player pages on the official site include a "best game of his career" annotated by each player. It doesn't say if these were personally selected by the players as the best game they've ever played as is implied. If so, it's a curious choice from Leko, who gives his one-sided crush of Grischuk from last year's Mexico WCh tournament. I can think of quite a few better ones just off the top of my head. Carlsen goes with his black win over Kramnik from this year's Corus tournament. Maybe Leko just didn't want to copycat by picking one of his own several spectacular wins over Kramnik with black. Tilburg 1998 is wild, an amazing defensive and counterattacking effort. Leko brilliantly busting Kramnik's Marshall prep in game 8 of their WCh match is more familiar.
Update: Carlsen drew game three in a save that Kasparov, checking in after a speech in Athens, called "Incredible! Ridiculous!" Carlsen then went on to beat Leko's Caro-Kann in game four, at last breaking through for what I think is his first win versus Leko at any time control against three classical losses.