I know that when at least one new permission is added, the app will not be auto-updated. The user has to manually update it. You will have "Manual Update" when the app's permissions have changed.
What about removing a permission ?
My current app version N is released. In the next release, one permission is removed.
Will the users of version N get an automatic update ?
Edit : https://android.stackexchange.com/questions/2958/why-do-some-of-my-apps-show-update-and-some-show-update-manual