[android-developers] BackupManager IGNORING BACKUP DATA without API key error message

I have encountered a problem with the BackupManager introduced in
Android 2.2: I took the Backup/Restore example project included with
the SDK, built an APK signed with a debug key, and loaded it onto both
a Droid and Nexus One running Android 2.2. Then I ran "adb shell bmgr
backup com.example.android.backuprestore; adb shell bmgr run". I
immediately saw the following line in logcat: E/
BackupTransportService( 1101): IGNORING BACKUP DATA without API key:
com.example.android.backuprestore

When I tried uninstalling and reinstalling the sample application, its
data was not restored automatically. In addition, running "adb shell
bmgr restore com.example.android.backuprestore" did not restore the
data.

When I repeated the process on an emulator running Android 2.2, it
worked perfectly.

Why would this fail on the device but work on the emulator? Has
anyone else run into this issue?

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