Hey all, Has anyone else encountered that bizarre little black icon that randomly pops down from the middle of the top edge of the iphone screen? It's only about 1/2" wide and looks like an air vent for an air conditioner... I've never noticed it before upgrading to ios 5. I've figured out that I must be touching the screen a certain way to make it mysteriously appear, but I have no idea what exactly I do to activate it or what its purpose is. It's actually kind of annoying sometimes because it will come down over part of something important in a game I like to play. I've scoured google with every way I could think of to ask about this thing and can find no information. Anyone have any knowledge of this?