Gizmodo (surprise!) is reporting that touching the steel frame of the iPhone 4 may reduce the quality of an already important AT&T signal. It is hard to argue with the video they provide:
Gizmodo has about 30 user videos showing issues as well as a link to a Danish scientist who predicted these issues. Something tells me those bumpers are going to sell pretty well.
Meanwhile MacRumors users are posting pictures of brown spots o nthe bottom right of their iPhone 4 Retina displays (below).