I have noticed, even before the upgrade, that sometimes photos or videos that I take will just disappear. I'll go to show someone and that photo isn't in the list of photos. It's not always the last photos I've taken, but usually it is. I have to do a reboot, and most of the time they re-appear, but it's a pain to do a reboot just to show someone a photo in your gallery. Anyone else have this issue? Or know of a fix?