If you have an EVO 4G LTE from Sprint, you may want to take a closer look at your unit before your initial 30 days are up. Some users over at XDA are reporting that their devices are experiencing light bleed around the home button when the button is lit up and the display is darkened. If you want to test out your unit, the app Dead Pixel Test can help.
The image above was taken in a long-exposure shot in a dark room, so the light bleed issue shouldn't be quite so noticeable. Nevertheless, the faulty unit on the right clearly has the 20th Century Fox searchlights some obvious light bleed.