Here's the hitch: Upgraded to iOS6. Everything seemed fine. Afterwards when I opened my purchased apps in the App store I get one of 3 buttons next to each App: Open, Download from the iCloud or INST. This last button is suspicious as it is greyed out and seem to be short for INSTALL, although nothing happens when I press it. I've lost roughly 1 out of every 7 apps, including games, magazines and things like adobe reader. How do I get them back? HELP!