Caligula, it's not a performance enhancing drug and I'd wager a guess that it's most likely something along the lines of what you said. There's this player in the scottish league I was reading about the other day who was banned for 4 weeks after testing positive but after explaining his case that the if was some kind of weight suppressant which specifically stated that it had no banned substances he was allowed to play again. Let's just hope Kolo has a valid explanation.
If only it was the other Toure, or even the likes of Tevez and Rooney. That would have been spesh.