Originally Posted by 5thWiggle
What version of Android? I've had this happen on ICS (and below) if apps are in use during an automatic update. I've since turned off ALL automatic updates because at least one of my reading apps are in use at all times.
Jelly Bean, I think. I don't have autoupdates turned on, as I too always have a reader on. I'm not sure if I accidentally changed something or what.
Is Moon+ on SD card or tablet? Could the SD card be misbehaving?