I'm not very happy to say it, but I think he's lipsyncing. I know all the changes he makes in Clocks, in every song actually, and seems very strange that he doesn't make any changes...of course it could be because of the rehearsals, but still. And I almost confirmed it in a very particular part of the song when he comes defased, in the "yoou" at 2:58 in the first Argentina show, 3:26 in the second show, 3:18 in Chile, 3:24 in Peru. If you guys notice it I think there's no doubt about it. We hope this is momentary because of some sort of problem with his voice. Have a nice day.