I received notification that update(s) available for installed apps, but when trying to download the update, I got the message 'Error 492'. I went to settings -> applications -> all -> google play store and cleared cache. I then went to recovery and cleared Cache and Dalvik cache. I was then able to download the update after the reboot, BUT got message 'invalid package' after attempt to install. Had to uninstall the app (Maps) and the reinstall the app (it installed without a problem). Why these issues?