Had a quick look but couldn't find this question before....? I have a 64Gb New iPad with a (very) few Apps installed, about 8. Every now and then I get a lovely melodious "dong" on my iPad. It isn't facebook or Skype or mail or the alarm. It isn't an "on the hour" chime. I don't think it is when the %age drops to/below anything!? It sometimes happens in the middle of the night. It probably happens more often than I hear it.... It is innoculous and not unpleasant, just puzzling. Anyone know what it is? Or could be?