About an hour and a half ago, I decided to reboot my phone just for plain good measure when an update was suddenly pushed to my HTC One by Sprint. Before I could wake up my phone and see the dialog and figure out what it was, it disappeared. It pretty much reset my Panels to factory presets and some other stuff. What was it? Was it a silent patch? An update to fix connectivity issues? Who knows.
Oh and it wasn't the Android 4.3 update, it was something else.