Problème d'ajout de contact dans le répertoire social de Xperia Arc

Sur mon téléphone, l'ajout d'un nouveau contact échoue par une fermeture inattendue. Les journaux de cette opération sont ;

10-13 08:06:57.801: INFO/CustomizationProvider(1340): No configuration file: /system/etc/customization/settings/com/sonyericsson/android/socialphonebook/custom_settings.xml
10-13 08:06:57.801: WARN/socialphonebook(12699): SettingsParser: No customization file exists.
10-13 08:06:57.801: ERROR/socialphonebook(12699): SettingsParser: key not found. key=[account-types]
10-13 08:06:57.831: DEBUG/szipinf(12699): Initializing inflate state
10-13 08:06:57.841: WARN/dalvikvm(12699): threadid=11: thread exiting with uncaught exception (group=0x2aac8560)
10-13 08:06:57.851: ERROR/AndroidRuntime(12699): FATAL EXCEPTION: AsyncTask #1
        java.lang.RuntimeException: An error occured while executing doInBackground()
        at android.os.AsyncTask$3.done(AsyncTask.java:200)
        at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
        at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
        at java.lang.Thread.run(Thread.java:1019)
        Caused by: java.lang.IllegalStateException: Top level element must be ContactsSource
        at com.sonyericsson.android.socialphonebook.model.ExternalSource.inflate(ExternalSource.java:137)
        at com.sonyericsson.android.socialphonebook.model.ExternalSource.inflate(ExternalSource.java:108)
        at com.sonyericsson.android.socialphonebook.model.ContactsSource.superInflate(ContactsSource.java:119)
        at com.sonyericsson.android.socialphonebook.model.ContactsSource.ensureInflated(ContactsSource.java:111)
        at com.sonyericsson.android.socialphonebook.model.Sources.getInflatedSource(Sources.java:369)
        at com.sonyericsson.android.socialphonebook.model.Sources.getAccounts(Sources.java:268)
        at com.sonyericsson.android.socialphonebook.ui.EditContactActivity$AddContactTask.doInBackground(EditContactActivity.java:1438)
        at com.sonyericsson.android.socialphonebook.ui.EditContactActivity$AddContactTask.doInBackground(EditContactActivity.java:1422)
        at com.sonyericsson.android.socialphonebook.util.WeakAsyncTask.doInBackground(WeakAsyncTask.java:49)
        at android.os.AsyncTask$2.call(AsyncTask.java:185)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
        ... 4 more
10-13 08:06:57.861: WARN/ActivityManager(242): Force finishing activity com.sonyericsson.android.socialphonebook/.ui.EditContactActivity
10-13 08:06:57.861: WARN/ActivityManager(242): Force finishing activity com.sonyericsson.android.socialphonebook/.SocialPhonebookActivity

A l'aide s'il vous plaît, je ne peux pas ajouter de contacts ( bizarre et drôle ! ! )