I recently dropped my iPhone 3G from a short height (about 2-3 feet)and ever since the area in the top left hand corner (Where the light sensors are) is causing problems. It seems to be acting as a second power button whenever I lightly push against the area. Before I had this problem but it was less consistent (sometimes it acted as power button, sometimes as silent switch) and could be solved by a reboot. Any ideas on whats wrong and whether or not its covered by a regular warranty?