diff --git a/pure2D-demo/.project b/pure2D-demo/.project
index e0e86bd3..621b59f7 100644
--- a/pure2D-demo/.project
+++ b/pure2D-demo/.project
@@ -30,11 +30,4 @@
 		<nature>com.android.ide.eclipse.adt.AndroidNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 	</natures>
-	<linkedResources>
-		<link>
-			<name>pure2d-src</name>
-			<type>2</type>
-			<location>/usr/local/funzio/pure2d/pure2D/src</location>
-		</link>
-	</linkedResources>
 </projectDescription>
diff --git a/pure2D/AndroidManifest.xml b/pure2D/AndroidManifest.xml
index bbe4567e..8a870ca2 100644
--- a/pure2D/AndroidManifest.xml
+++ b/pure2D/AndroidManifest.xml
@@ -5,7 +5,7 @@
 
     <uses-sdk
         android:minSdkVersion="8"
-        android:targetSdkVersion="17" />
+        android:targetSdkVersion="19" />
 
     <application
         android:allowBackup="true"
diff --git a/pure2D/project.properties b/pure2D/project.properties
index 484dab07..91d2b024 100644
--- a/pure2D/project.properties
+++ b/pure2D/project.properties
@@ -11,5 +11,5 @@
 #proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
 
 # Project target.
-target=android-17
+target=android-19
 android.library=true
diff --git a/pure2D/src/com/funzio/pure2D/animators/TweenAnimator.java b/pure2D/src/com/funzio/pure2D/animators/TweenAnimator.java
index 06ee2821..03220dc6 100644
--- a/pure2D/src/com/funzio/pure2D/animators/TweenAnimator.java
+++ b/pure2D/src/com/funzio/pure2D/animators/TweenAnimator.java
@@ -86,7 +86,7 @@ public boolean update(final int deltaTime) {
                     timeline = ((float) mElapsedTime % (float) mDuration) / mDuration;
                 } else if (mLoopMode == LoopModes.LOOP_REVERSE) {
                     timeline = ((float) mElapsedTime % (float) mDuration) / mDuration;
-                    if (trips % 2 == 1) {
+                    if (trips % 2 != 0) {
                         // reverse
                         timeline = 1 - timeline;
                     }
diff --git a/pure2D/src/com/funzio/pure2D/animators/UnstableMoveAnimator.java b/pure2D/src/com/funzio/pure2D/animators/UnstableMoveAnimator.java
index ec12ad4f..6eab341a 100644
--- a/pure2D/src/com/funzio/pure2D/animators/UnstableMoveAnimator.java
+++ b/pure2D/src/com/funzio/pure2D/animators/UnstableMoveAnimator.java
@@ -124,7 +124,7 @@ protected void onUpdate(final float value) {
                 int index = (int) Math.floor(mElapsedTime / mSegmentDuration);
                 if (index != mCurrentSegment) {
                     mCurrentSegment = index;
-                    if (index % 2 == 1) {
+                    if (index % 2 != 0) {
                         mModStartX = mModX;
                         mModStartY = mModY;
                         // go backward
diff --git a/pure2D/src/com/funzio/pure2D/atlas/ImageSequenceBufferAtlas.java b/pure2D/src/com/funzio/pure2D/atlas/ImageSequenceBufferAtlas.java
index 409fed39..f2713d7b 100644
--- a/pure2D/src/com/funzio/pure2D/atlas/ImageSequenceBufferAtlas.java
+++ b/pure2D/src/com/funzio/pure2D/atlas/ImageSequenceBufferAtlas.java
@@ -29,8 +29,6 @@
 import java.util.Arrays;
 import java.util.Comparator;
 
-import javax.microedition.khronos.opengles.GL10;
-
 import android.content.res.AssetManager;
 import android.graphics.Point;
 import android.graphics.PointF;
@@ -59,7 +57,7 @@ public class ImageSequenceBufferAtlas extends Atlas {
     public static final String TAG = ImageSequenceBufferAtlas.class.getSimpleName();
 
     private GLState mGLState;
-    private GL10 mGL;
+    // private GL10 mGL;
     private BufferTexture mTexture;
     private FrameBuffer mFrameBuffer;
 
@@ -106,7 +104,7 @@ public ImageSequenceBufferAtlas(final GLState glState) {
         Log.v(TAG, "ImageSequenceAtlas()");
 
         mGLState = glState;
-        mGL = mGLState.mGL;
+        // mGL = mGLState.mGL;
 
         if (!FrameBuffer.isSupported()) {
             Log.e(TAG, "FrameBuffer is not supported!\n" + Log.getStackTraceString(new Exception()));
diff --git a/pure2D/src/com/funzio/pure2D/gl/gl10/textures/BufferTexture.java b/pure2D/src/com/funzio/pure2D/gl/gl10/textures/BufferTexture.java
index e01651d5..66a09e04 100644
--- a/pure2D/src/com/funzio/pure2D/gl/gl10/textures/BufferTexture.java
+++ b/pure2D/src/com/funzio/pure2D/gl/gl10/textures/BufferTexture.java
@@ -40,7 +40,7 @@ protected BufferTexture(final GLState glState, final int width, final int height
         super(glState);
 
         // create an blank texture
-        load(null, Math.round(width), Math.round(height), 0);
+        load(null, width, height, 0);
     }
 
     /**
diff --git a/pure2D/src/com/funzio/pure2D/loaders/tasks/VersionedDownloadTaskGroup.java b/pure2D/src/com/funzio/pure2D/loaders/tasks/VersionedDownloadTaskGroup.java
index c7232c0f..0766158a 100644
--- a/pure2D/src/com/funzio/pure2D/loaders/tasks/VersionedDownloadTaskGroup.java
+++ b/pure2D/src/com/funzio/pure2D/loaders/tasks/VersionedDownloadTaskGroup.java
@@ -114,10 +114,11 @@ protected boolean runTasks() {
                                 fileHasSpecificVersion = true;
                                 Log.d(TAG, relativePathFromVersionFile + " has new version: " + remoteFileVersion);
                             }
+
+                            // put to the local version file
+                            localVersionProperties.put(relativePathFromVersionFile, remoteFileVersion);
                         }
 
-                        // put to the local version file
-                        localVersionProperties.put(relativePathFromVersionFile, remoteFileVersion);
                         // flag to update the file
                         localVersionFileUpdated |= fileHasSpecificVersion;
                     }
diff --git a/pure2D/src/com/funzio/pure2D/particles/nova/NovaEmitter.java b/pure2D/src/com/funzio/pure2D/particles/nova/NovaEmitter.java
index b4e9e7fb..164bff3d 100644
--- a/pure2D/src/com/funzio/pure2D/particles/nova/NovaEmitter.java
+++ b/pure2D/src/com/funzio/pure2D/particles/nova/NovaEmitter.java
@@ -128,7 +128,7 @@ protected void createManipulators() {
         mTimeline.start();
 
         // optional emitter animator
-        if (mEmitterVO.animator != null && mEmitterVO.animator != "") {
+        if (mEmitterVO.animator != null && !"".equals(mEmitterVO.animator)) {
             mAnimator = mFactory.createAnimator(this, mFactory.mNovaVO.getAnimatorVO(mEmitterVO.animator), -1);
 
             if (mAnimator != null) {
diff --git a/pure2D/src/com/funzio/pure2D/particles/nova/vo/RecursiveTrajectoryAnimatorVO.java b/pure2D/src/com/funzio/pure2D/particles/nova/vo/RecursiveTrajectoryAnimatorVO.java
index dd2652b9..91eb3499 100644
--- a/pure2D/src/com/funzio/pure2D/particles/nova/vo/RecursiveTrajectoryAnimatorVO.java
+++ b/pure2D/src/com/funzio/pure2D/particles/nova/vo/RecursiveTrajectoryAnimatorVO.java
@@ -57,11 +57,11 @@ public void resetAnimator(final int emitIndex, final Manipulatable target, final
         super.resetAnimator(emitIndex, target, animator);
 
         final RecursiveTrajectoryAnimator move = (RecursiveTrajectoryAnimator) animator;
-        if (move != null) {
-            if (deceleration_rate != null) {
-                move.setDecelerationRate(NovaConfig.getFloat(deceleration_rate, emitIndex, 0));
-            }
+        // if (move != null) {
+        if (deceleration_rate != null) {
+            move.setDecelerationRate(NovaConfig.getFloat(deceleration_rate, emitIndex, 0));
         }
+        // }
     }
 
 }
diff --git a/pure2D/src/com/funzio/pure2D/shapes/Polyline3D.java b/pure2D/src/com/funzio/pure2D/shapes/Polyline3D.java
index 909d3b8e..8e8bfc5c 100644
--- a/pure2D/src/com/funzio/pure2D/shapes/Polyline3D.java
+++ b/pure2D/src/com/funzio/pure2D/shapes/Polyline3D.java
@@ -46,7 +46,6 @@ protected void validateVertices() {
         if (points instanceof Point3D[]) {
             final Point3D[] point3Ds = (Point3D[]) points;
 
-            mPoints = points;
             final int len = mPoints.length;
 
             allocateVertices(len * 2, VERTEX_POINTER_SIZE);// each point has upper and lower points
diff --git a/pure2D/src/com/funzio/pure2D/text/BmfTextObject.java b/pure2D/src/com/funzio/pure2D/text/BmfTextObject.java
index 10706440..e026a31e 100644
--- a/pure2D/src/com/funzio/pure2D/text/BmfTextObject.java
+++ b/pure2D/src/com/funzio/pure2D/text/BmfTextObject.java
@@ -60,6 +60,7 @@ public class BmfTextObject extends BaseDisplayObject implements Cacheable {
     protected static final String ATT_TEXT = "text";
     protected static final String ATT_TEXT_ALIGN = "textAlign";
     protected static final String ATT_FONT = "font";
+    protected static final String ATT_SIZE = "size";
 
     protected BitmapFont mBitmapFont;
     protected TextOptions mTextOptions;
@@ -454,6 +455,15 @@ public void setXMLAttributes(final XmlPullParser xmlParser, final UIManager mana
             if (bitmapFont != null) {
                 setBitmapFont(bitmapFont);
                 setText(manager.evalString(xmlParser.getAttributeValue(null, ATT_TEXT)));
+                final String sizeAttr = xmlParser.getAttributeValue(null, ATT_SIZE);
+                if (sizeAttr != null) {
+                    try {
+                        final int size = Integer.parseInt(sizeAttr);
+                        setScale(size / bitmapFont.getTextOptions().inTextPaint.getTextSize());
+                    } catch (NumberFormatException e) {
+                        Log.e(TAG, "Invalid value of 'size': " + sizeAttr);
+                    }
+                }
 
                 final String letterSpacing = xmlParser.getAttributeValue(null, ATT_LETTER_SPACING);
                 if (letterSpacing != null) {
diff --git a/pure2D/src/com/funzio/pure2D/ui/Button.java b/pure2D/src/com/funzio/pure2D/ui/Button.java
index 3db3ff65..250c62e9 100644
--- a/pure2D/src/com/funzio/pure2D/ui/Button.java
+++ b/pure2D/src/com/funzio/pure2D/ui/Button.java
@@ -49,7 +49,6 @@ public class Button extends DisplayGroup implements UIObject {
     protected int mState = STATE_UP;
     protected Texture[] mTextures;
 
-    protected boolean mTouchable = true; // true by default
     protected boolean mFocus = false;
     private int mTouchPointerID = -1;
 
diff --git a/pure2D/src/com/funzio/pure2D/ui/PageStacker.java b/pure2D/src/com/funzio/pure2D/ui/PageStacker.java
index 3ff03ff5..2b47a1d9 100644
--- a/pure2D/src/com/funzio/pure2D/ui/PageStacker.java
+++ b/pure2D/src/com/funzio/pure2D/ui/PageStacker.java
@@ -101,13 +101,13 @@ public void run() {
                 // slide out the current page
                 if (currentPage != null) {
                     currentPage.transitionOut(false);
-                }
 
-                // slide in the previous page
-                if (!currentPage.isPageFloating()) {
-                    if (previousPage != null) {
-                        mContainer.addChild(previousPage);
-                        previousPage.transitionIn(false);
+                    // slide in the previous page
+                    if (!currentPage.isPageFloating()) {
+                        if (previousPage != null) {
+                            mContainer.addChild(previousPage);
+                            previousPage.transitionIn(false);
+                        }
                     }
                 }
             }
diff --git a/pure2D/src/com/funzio/pure2D/ui/UIConstraint.java b/pure2D/src/com/funzio/pure2D/ui/UIConstraint.java
index 5a97fc0f..9d31af34 100644
--- a/pure2D/src/com/funzio/pure2D/ui/UIConstraint.java
+++ b/pure2D/src/com/funzio/pure2D/ui/UIConstraint.java
@@ -29,7 +29,6 @@
 import org.xmlpull.v1.XmlPullParser;
 
 import com.funzio.pure2D.DisplayObject;
-import com.funzio.pure2D.Scene;
 import com.funzio.pure2D.containers.Container;
 import com.funzio.pure2D.containers.DisplayGroup;
 import com.funzio.pure2D.containers.LinearGroup;
@@ -87,7 +86,7 @@ public static enum UNIT {
     public UNIT childrenGapUnit = UNIT.UNSET;
 
     private UIConfigVO mUIConfigVO;
-    private int mAxisSystem = Scene.AXIS_BOTTOM_LEFT;
+    // private int mAxisSystem = Scene.AXIS_BOTTOM_LEFT;
     private boolean mHasAttributes = false;
 
     public UIConstraint() {
@@ -100,7 +99,7 @@ public UIConstraint(final XmlPullParser parser, final UIManager manager) {
 
     public void setAttributes(final XmlPullParser parser, final UIManager manager) {
         mUIConfigVO = manager.getConfig();
-        mAxisSystem = manager.getTextureManager().getGLState().getAxisSystem();
+        // mAxisSystem = manager.getTextureManager().getGLState().getAxisSystem();
         mHasAttributes = false;
 
         widthUnit = getAttributeUnit(parser, ATT_WIDTH);
diff --git a/pure2D/src/com/funzio/pure2D/ui/UIManager.java b/pure2D/src/com/funzio/pure2D/ui/UIManager.java
index 7a438734..58cb8e17 100644
--- a/pure2D/src/com/funzio/pure2D/ui/UIManager.java
+++ b/pure2D/src/com/funzio/pure2D/ui/UIManager.java
@@ -151,9 +151,9 @@ public DisplayObject load(final int xmlResource) {
     public TextureOptions getTextureOptions() {
         if (mTextureOptions == null) {
             mTextureOptions = TextureOptions.getDefault();
-            mTextureOptions.inMipmaps = mConfigVO.texture_manager.texture_options.mipmaps;
 
             if (mConfigVO != null) {
+                mTextureOptions.inMipmaps = mConfigVO.texture_manager.texture_options.mipmaps;
                 // apply scale to texture options
                 mTextureOptions.inScaleX = mTextureOptions.inScaleY = mConfigVO.screen_scale;
             }
diff --git a/pure2D/src/com/funzio/pure2D/utils/Pure2DUtils.java b/pure2D/src/com/funzio/pure2D/utils/Pure2DUtils.java
index a4d33b75..ef06c949 100644
--- a/pure2D/src/com/funzio/pure2D/utils/Pure2DUtils.java
+++ b/pure2D/src/com/funzio/pure2D/utils/Pure2DUtils.java
@@ -503,7 +503,6 @@ public static int getNextPO2(int n) {
         n = n | (n >> 4);
         n = n | (n >> 8);
         n = n | (n >> 16);
-        n = n | (n >> 32);
         return n + 1;
     }