Android: Proguard devuelto con el código de error 1. Consulte la consola

Tengo un problema con proguard. consigo esto en la consola que uso proguard 4.11. ¿cómo puedo arreglar esto?

[2014-02-11 12:46:55 - Distributor] Proguard returned with error code 1. See console [2014-02-11 12:46:55 - Distributor] Note: there were 4 duplicate class definitions. [2014-02-11 12:46:55 - Distributor] (http://proguard.sourceforge.net/manual/troubleshooting.html#duplicateclass) [2014-02-11 12:46:55 - Distributor] Warning: library class android.content.res.XmlResourceParser extends or implements program class org.xmlpull.v1.XmlPullParser [2014-02-11 12:46:55 - Distributor] Warning: library class android.content.Intent depends on program class org.xmlpull.v1.XmlPullParser [2014-02-11 12:46:55 - Distributor] Warning: library class android.content.IntentFilter depends on program class org.xmlpull.v1.XmlSerializer [2014-02-11 12:46:55 - Distributor] Warning: library class android.content.IntentFilter depends on program class org.xmlpull.v1.XmlPullParser [2014-02-11 12:46:55 - Distributor] Warning: library class android.content.res.ColorStateList depends on program class org.xmlpull.v1.XmlPullParser [2014-02-11 12:46:55 - Distributor] Warning: library class android.graphics.drawable.ColorDrawable depends on program class org.xmlpull.v1.XmlPullParser [2014-02-11 12:46:55 - Distributor] Warning: library class android.graphics.drawable.Drawable depends on program class org.xmlpull.v1.XmlPullParser [2014-02-11 12:46:55 - Distributor] Warning: library class android.graphics.drawable.Drawable depends on program class org.xmlpull.v1.XmlPullParser [2014-02-11 12:46:55 - Distributor] Warning: library class android.graphics.drawable.Drawable depends on program class org.xmlpull.v1.XmlPullParser [2014-02-11 12:46:55 - Distributor] Warning: library class android.graphics.drawable.LevelListDrawable depends on program class org.xmlpull.v1.XmlPullParser [2014-02-11 12:46:55 - Distributor] Warning: library class android.view.LayoutInflater depends on program class org.xmlpull.v1.XmlPullParser [2014-02-11 12:46:55 - Distributor] Warning: library class android.view.LayoutInflater depends on program class org.xmlpull.v1.XmlPullParser [2014-02-11 12:46:55 - Distributor] Warning: there were 12 instances of library classes depending on program classes. [2014-02-11 12:46:55 - Distributor] You must avoid such dependencies, since the program classes will [2014-02-11 12:46:55 - Distributor] be processed, while the library classes will remain unchanged. [2014-02-11 12:46:55 - Distributor] (http://proguard.sourceforge.net/manual/troubleshooting.html#dependency) [2014-02-11 12:46:55 - Distributor] Error: Please correct the above warnings first. 

He añadido esta línea a proguard-project.txt

  -dontwarn org.xmlpull.v1.** 

y esta línea a project.properties

  proguard.config=proguard-project.txt 
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