Sorry for a late reply. I expected a notification of some sort when someone responded to my question. Yes, Play Store auto-update is turned on fory apps. My apps auto-update every time I turn on my phone in the morning. The strange message was not in any of my email inboxes or junk folders, and neither was it in my Verizon Message+ texting app. The only glimse I saw of the notification was from my just-awoken lock screen. My phone is a new Force Droid.