Tengo un problema con el bloqueo de mi aplicación de Android al intentar restaurar mis fragmentos. No he agregado ninguna variable personalizada al paquete que estoy tratando de restaurar, todo está predeterminado. Estoy usando Fragments y ViewPager. Ver mis fragmentos de código a continuación:

public static class MyAdapter extends FragmentStatePagerAdapter {
    public MyAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public int getCount() {
        return NUM_ITEMS;
    }

    public int getCurrentItemPosition(Fragment fragment){
        return getItemPosition(fragment);
    }

    @Override
    public Fragment getItem(int position) {
        return ContentFragment.newInstance(position);
    }
}

public class MyActivity extends FragmentActivity {

static final int NUM_ITEMS = 100000;
public int currentSelectedPage;
private int changeToFragmentIndex;
public DateTime midDate;
MyAdapter mAdapter;
ViewPager mPager;

/** Called when the activity is first created. */
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.diary);
    MyApplication application = (MyApplication)getApplication();
    application.dataController.myActivity = this;
    mAdapter = new MyAdapter(getSupportFragmentManager());
    mPager = (ViewPager)findViewById(R.id.pager);
    mPager.setAdapter(mAdapter);
    int newDay = application.daysBetween(DateTime.now(), DateTime.parse(application.day.dateToShortString()));

    this.currentSelectedPage = NUM_ITEMS/2+newDay;
    mPager.setCurrentItem(NUM_ITEMS/2+newDay);
    mPager.setOnPageChangeListener(new SimpleOnPageChangeListener(){
        public void onPageSelected(int position){
            currentSelectedPage = position;
            ContentFragment fragment = (ContentFragment) mAdapter.instantiateItem(mPager, currentSelectedPage);
            fragment.loadData();
        }
    });
}

}

public class ContentFragment extends Fragment {
private View v;
static final int NUM_ITEMS = 100000;

static ContentFragment newInstance(int num) {
    ContentFragment f = new ContentFragment();

    return f;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    if (container == null)
        return null;
    v = inflater.inflate(R.layout.diarycontent, container, false);
    return v;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

}

@Override
public void onSaveInstanceState(Bundle savedInstanceState){
    super.onSaveInstanceState(savedInstanceState);
    setUserVisibleHint(true);
}
}

Recibo este stackstrace:

Caused by: java.lang.NullPointerException
at android.support.v4.app.FragmentManagerImpl.getFragment(FragmentManager.java:519)
at android.support.v4.app.FragmentStatePagerAdapter.restoreState(FragmentStatePagerAdapter.java:1 55)
at android.support.v4.view.ViewPager.onRestoreInstanceState(ViewPager.java:522)

Como he entendido, este puede ser un problema conocido con el paquete de soporte y la única solución posible sería usar setUserVisibleHint (true) en onSaveInstanceState. Pero eso no ayudó.

¿Alguien sabe otra solución al problema o lo que he hecho mal?