I have recently noticed my alarm not going off in the morning on a seemingly random basis. It happened this morning, I did notice then when I finally woke up and checked the phone, I had locked the phone with a game app open. I thought this might be the issue but I tested it. Set an alarm, left an app open and locked the phone, the alarm went off. I checked, the ringer was not on silent. Has anyone had any issues with the alarm not going off? I use this as my primary alarm, so when it does not ring it is kind of a problem. 3G iphone, 16gb, 2.1 software, not jailbroken. Thanks for any insight.