diff --git a/res/drawable/magicsmoke_thumb.png b/res/drawable/magicsmoke_thumb.png
index 8c937b8..0349547 100644
--- a/res/drawable/magicsmoke_thumb.png
+++ b/res/drawable/magicsmoke_thumb.png
Binary files differ
diff --git a/res/layout/selector.xml b/res/layout/selector.xml
index 9b6b22f..304d305 100644
--- a/res/layout/selector.xml
+++ b/res/layout/selector.xml
@@ -31,13 +31,4 @@
         android:background="#40000000"
     />
 
-    <Button
-        android:layout_width="160dip"
-        android:layout_height="wrap_content"
-        android:text="@string/ok"
-        android:onClick="setLiveWallpaper"
-        android:layout_alignParentBottom="true"
-        android:layout_centerHorizontal="true"
-    />
-
 </RelativeLayout>
diff --git a/src/com/android/magicsmoke/MagicSmokeRS.java b/src/com/android/magicsmoke/MagicSmokeRS.java
index 201aacd..50c3b2e 100644
--- a/src/com/android/magicsmoke/MagicSmokeRS.java
+++ b/src/com/android/magicsmoke/MagicSmokeRS.java
@@ -29,7 +29,6 @@
 import android.graphics.BitmapFactory;
 import android.media.MediaPlayer;
 import android.os.Handler;
-import android.renderscript.Mesh.Primitive;
 import android.renderscript.*;
 import android.renderscript.Element.Builder;
 import android.renderscript.ProgramStore.BlendDstFunc;
@@ -116,7 +115,7 @@
         public boolean mPreMul;
     }
 
-    public static final int DEFAULT_PRESET = 4;
+    public static final int DEFAULT_PRESET = 16;
     public static final Preset [] mPreset = new Preset[] {
         //       proc    back     low       high     alph  mask  rot    swap   premul
         new Preset(1,  0x000000, 0x000000, 0xffffff, 2.0f, 0x0f, true,  false, false),
@@ -149,12 +148,19 @@
         mHeight = height;
         mContext = context;
         mSharedPref = mContext.getSharedPreferences("magicsmoke", Context.MODE_PRIVATE);
+        mSharedPref.registerOnSharedPreferenceChangeListener(this);
         makeNewState();
     }
 
     public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
 
-        makeNewState();
+        if (!mIsStarted) {
+            start();
+            mRS.finish();
+            stop(false);
+        } else {
+            makeNewState();
+        }
     }
 
     void makeNewState() {
@@ -236,16 +242,17 @@
     }
 
     @Override
-    public void stop() {
-        mSharedPref.unregisterOnSharedPreferenceChangeListener(this);
-        super.stop();
+    public void stop(boolean forReal) {
+        if (forReal) {
+            mSharedPref.unregisterOnSharedPreferenceChangeListener(this);
+        }
+        super.stop(forReal);
     }
 
     @Override
     public void start() {
-        super.start();
-        mSharedPref.registerOnSharedPreferenceChangeListener(this);
         makeNewState();
+        super.start();
     }
 
     float alphafactor;
diff --git a/src/com/android/magicsmoke/MagicSmokeSelector.java b/src/com/android/magicsmoke/MagicSmokeSelector.java
index 55addf6..22c7675 100644
--- a/src/com/android/magicsmoke/MagicSmokeSelector.java
+++ b/src/com/android/magicsmoke/MagicSmokeSelector.java
@@ -73,12 +73,6 @@
         }
     }
     
-    // button hook
-    public void setLiveWallpaper(View v) {
-        finish();
-    }
-
-
     @Override
     public void onResume() {
         super.onResume();
diff --git a/src/com/android/magicsmoke/RenderScriptScene.java b/src/com/android/magicsmoke/RenderScriptScene.java
index fdf4935..fbab205 100644
--- a/src/com/android/magicsmoke/RenderScriptScene.java
+++ b/src/com/android/magicsmoke/RenderScriptScene.java
@@ -27,6 +27,7 @@
     protected int mWidth;
     protected int mHeight;
     protected boolean mPreview;
+    protected boolean mIsStarted;
     protected Resources mResources;
     protected RenderScriptGL mRS;
     protected ScriptC mScript;
@@ -69,12 +70,14 @@
 
     protected abstract ScriptC createScript();
 
-    public void stop() {
+    public void stop(boolean forReal) {
         mRS.bindRootScript(null);
+        mIsStarted = false;
     }
 
     public void start() {
         mRS.bindRootScript(mScript);
+        mIsStarted = true;
     }
 
     public void resize(int width, int height) {
diff --git a/src/com/android/magicsmoke/RenderScriptWallpaper.java b/src/com/android/magicsmoke/RenderScriptWallpaper.java
index c9bbdd9..c0bf50d 100644
--- a/src/com/android/magicsmoke/RenderScriptWallpaper.java
+++ b/src/com/android/magicsmoke/RenderScriptWallpaper.java
@@ -54,7 +54,7 @@
 
         private void destroyRenderer() {
             if (mRenderer != null) {
-                mRenderer.stop();
+                mRenderer.stop(true);
                 mRenderer = null;
             }
             if (mRs != null) {
@@ -70,7 +70,7 @@
                 if (visible) {
                     mRenderer.start();
                 } else {
-                    mRenderer.stop();
+                    mRenderer.stop(false);
                 }
             }
         }