So, I downloaded 4.2.1 about an hour ago. Pretty stoked to try it out. First, I can't figure out the multitasking. I read where others say there is a bar that you use for multitasking. Either I don't know how to bring it up or I just don't have it. Second, the mute switch doesn't mute anything, just flashes a speaker with a line through it symbol. And third, where is the button that is supposed to lock the orientation? Now that the switch is for mute, I have no way to lock it. Getting kinda' frustrated here. I'm sure that someone will come along and say the answer is simple, and I hope that is the case, but for now I'm wondering if something is wrong.