Jolouis, both times that FlipClock locked up was just after the music (mp3 file) begain to play. I noticed that there were black rectangles on the main clock screen as if an email alert was trying to be displayed during the alarm or else some other message like "Unable to connect to one or more accounts" was trying to be displayed. More detail: My alarm was set to go off at 8:00am. In "Alarms Set" screen Mode = "sound", set for "loop", snooze=off. FlipClock was not even running, not minimized. It runs when there is an alarm condition.