I do not want to be mean, but the sudden "old knee injury" of Chavez has a perfect timing. That is, he can bail out of any summit, any press meeting, any cadena even if he wishes so. Then again after having been exposed as to give 300 million USD to a terrorist association, you may want to keep a low profile for a while. And if that means postponing once again your first official meeting with Dilma Roussef, who has seen everyone but you already, well, so be it. She might as well start her second round of Samba dancing with the other guys.
I have the suspicion that the FARC linkage of Venezuela and Ecuador is just starting its aftershocks, no matter how much the ladies protest.