I am under the impression that Nandroid backup & restore completely wipes the system data and overwrites with a saved image of the Android OS with whatever was on the phone at the time of backup. So I created a backup to my SD Card, installed an app (ROM Manager)--couldn't get it to work so I uninstalled it. I then did a restore on my previously saved backup and right after booting up, I see a notification, open it, and catch ROM Manager downloading again to, eventually, install itself. How does the market, or my phone, know that this app was previously installed? Is it saved to my Google account somewhere? Is the data stored on my SD Card? My Nandroid backup that was created without the app being installed shouldn't have this information still on it should it?