AdMob AdView SDK 6.0.1 memory usage - memory

Question

I try to include an AdMob banner in my Android App using the AdMobsAdsSdk6.0.1.
The banner shows up correctly but increases the displayed memory-usage in the phones task manager from 2 MB to 10 MB. DDMS shows approx. 5MB. I have read some articles about possible memory leaks in older versions, but could not find anything solving my problem. I reproduced the behavior with a simple test app.
The Activity only holds the AdView
public class TestActivity extends Activity {
private AdView adView;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
adView = new AdView(this, AdSize.BANNER, "adunitid");
LinearLayout layout = (LinearLayout) findViewById(R.id.content_Layout);
layout.addView(adView);
adView.loadAd(new AdRequest());
}
#Override
protected void onDestroy() {
if (adView != null) {
adView.destroy();
}
super.onDestroy();
}
}
The Manifest is also only a copy from the tutorial
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="admobtest.test"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="4" android:targetSdkVersion="13" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".TestActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.google.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" />
</application>
</manifest>
I also tried to include the banner via xml but i finally get the same results. Switching to landscape and back raises the memory further and further. Am i missing something or can somebody give me some hint how to solve this? I thought adView.destroy solved the memory leak.