Who doesn't know to count till 40?

I read this and then guess what happened! It's all your fault, you jinxed it :P

Apparently Naka lost on time because he thought 40 moves had been played and they hadn't. Did he pitch a fit or something ? I am sure he isnt the first top player this has happened to and he won't be the last. 

He started a discussion with the referee and the opponent after he flagged

He started a discussion , or an argument ? 

After the game, Nakamura explained that in time trouble, he had looked at the arbiter and asked whether 40 moves had been played. He was unaware this was not allowed, having asked this during his previous game against Ivanchuk. The arbiter nodded his head up and down, which he took to mean the 40th move had been reached, and relaxed. When his flag fell, and he was informed he had lost, he was extremely upset.

This is from chessbase. 

he could have annotated the number of movements, look at clock to see if the time has been added, or look at the panels with the movements but decided to try to communicate with the arbiter (which is forbidden) and flagged. Then he didn't accept that he has lost and that the responsible from his lost game was himself. At least he didn't tweet anything complaining (as he did when he lost to Ivanchuk)

It happens to all of us, we all get knackered from time to time.

From "The week in chess"

Nakamura donated three points to Vallejo with an act of real stupidity, as I'm sure he will come to acknowledge. The time control in this event has had a huge effect on the results and here and Nakamura confused himself on move 40. He should have been able to work out from the state of Vallejo's clock and his own that he hadn't passed time control. Instead he asked the arbiter if they had passed time control and thought he saw him nod and proceeded to go and get an orange juice. When he came back to the board he had lost on time. He had put the arbiter in a difficult position as it isn't the arbiter's job to tell the players this fact. Also the electronic demonstration boards weren't in view of the players as they often are. A totally self-inflicted blow by Nakamura whose appeal was immediately rejected. I'm sure he'll chalk it down to experience by tomorrow. He's also not going to get much sympathy from the average player who face this problem themselves almost every game without electronic clocks, boards or arbiters. The most sickening thing for Nakamura is that after Carlsen's win he had a decent chance of catching him as the final position was a lot better for him.

I've lost many chessgames and I've won my fair share too, but none have been this painful ever. Thankfully there are other things in life.

Nakamura's Twitter Page

I understand the situation . However, if the arbiter did nod his head " yes " then Nakamura was misled. The arbiter also broke the rules himself if he answered Nakamura in any way... its forbidden.  Apparently Nakamura also asked about the time control in his game with Ivanchuk. Why wasnt he informed at this time that this isnt allowed and did the arbiter answer him then ? Nakamura broke the rules by even asking the arbiter I believe, but if the arbiter answered he also broke the rules . If the arbiter did answer Nakamura " yes " ( nodding his head up and down when Nakamura asked ) the arbiter also broke the rules as well as misled Nakamura into thinking the time cntrol had been made. Considering his opponent and Arbiter are both Spanish some might say this deception was intentional. Was it ?  I dont know but clearly both Nakamura and the Arbiter broke rules here. Was language a problem ?  I doubt it.... 

no nakamura lost to Britney Spears and wanted to marry her, or what