I've had my Desire for over a month now and most features are set up sync/update about every 3 hours, including email polling. 2 days ago I started getting woken up in the middle of the night by notifications. This has never been a problem before and I think I changed a setting when I first got the phone that let me choose daytime and night time periods, so the phone would only 'wake up' and make a noise during the day. I've looked through the phone settings and the settings of my apps and email clients but can't seem to find anything that keeps the phone silent at night. I can always use the audio toggle to turn the phone to silent, but I'm sure there's a way to achieve the same result automatically. Any ideas?