I was trying to update an app in the AppStore and an error - Error 5002 - popped up. I read a bit about it and saw that one solution was to remove the app and purchase it again. I decided to look through the applications that I had bought or downloaded for free, and I noticed that a few of them had a generic black icon. I clicked on each of those icons, and some of them seem like older versions of certain apps that were still being stored on my computer. Others apps, however, seemed to be missing their .ipa files, and I never removed them! That is not an issue for apps that still exist in iTunes, but two of the .ipa files that disappeared were for Light, Tomatoes (a movie review app), and PhoneSaber - three apps that no longer exist in iTunes! I was pretty ticked off that these files have been deleted! I never backed up these files, so they are gone forever. I'm not sure if Apple is causing these files to be deleted somehow, but it is a good idea to back up the .ipa files in the event that it is doing so!! I ended up deleting the file that was causing the 5002 error and downloaded it again. But I was left a bit bothered that those other files were deleted without my authorization! It is curious that I also have NetShare (which I purchased before it was pulled), but that file was not removed! Has anybody had this experience?