I've just bought my iPad in the US and it was working perfectly. Back to Brazil today (where the iPad 3 is not available for purchase) I realized the sound was only working for alerts, but when tried to use apps, youtube or even my videos, there is no sound. Curiously, I plugged in my headphone and the sound works normally. I've already tried the mute/rotation button, changed its setting, and nothing happened - still only have sound through my headphones. As I bought my iPad in Houston and am far from it, I count on you guys expertise helping me out with this. Ps: my os is the 5.1 but a friend of mine told me these bugs happen with the gadget is new and, as soft updates are released, it tends to be fixed. But as Im not all sure of that, Im pretty anxious to find the cause and fix it up. Many thanks!!