diff --git a/cocos2dx/include/CCParallaxNode.h b/cocos2dx/include/CCParallaxNode.h
index 630ea0a3e0..117fc95475 100644
--- a/cocos2dx/include/CCParallaxNode.h
+++ b/cocos2dx/include/CCParallaxNode.h
@@ -1,6 +1,7 @@
 /****************************************************************************
 Copyright (c) 2010-2011 cocos2d-x.org
 Copyright (c) 2009-2010 Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
@@ -49,9 +50,9 @@ namespace cocos2d {
 		CCParallaxNode();
 		virtual ~CCParallaxNode();
 		static CCParallaxNode * node();
-		virtual void addChild(CCNode * child, int z, CCPoint parallaxRatio, CCPoint positionOffset);
+		virtual void addChild(CCNode * child, unsigned int z, CCPoint parallaxRatio, CCPoint positionOffset);
 		// super methods
-		virtual void addChild(CCNode * child, int zOrder, int tag);
+		virtual void addChild(CCNode * child, unsigned int zOrder, int tag);
 		virtual void removeChild(CCNode* child, bool cleanup);
 		virtual void removeAllChildrenWithCleanup(bool cleanup);
 		virtual void visit(void);
diff --git a/cocos2dx/include/CCTMXLayer.h b/cocos2dx/include/CCTMXLayer.h
index 722b4781a4..780d89dd3f 100644
--- a/cocos2dx/include/CCTMXLayer.h
+++ b/cocos2dx/include/CCTMXLayer.h
@@ -1,6 +1,7 @@
 /****************************************************************************
 Copyright (c) 2010-2011 cocos2d-x.org
 Copyright (c) 2009-2010 Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
@@ -70,7 +71,7 @@ namespace cocos2d {
 		/** Tilset information for the layer */
 		CC_PROPERTY(CCTMXTilesetInfo*, m_pTileSet, TileSet);
 		/** Layer orientation, which is the same as the map orientation */
-		CC_SYNTHESIZE(int, m_nLayerOrientation, LayerOrientation);
+		CC_SYNTHESIZE(unsigned int, m_uLayerOrientation, LayerOrientation);
 		/** properties from the layer. They can be added using Tiled */
 		CC_PROPERTY(CCStringToStringDictionary*, m_pProperties, Properties);
 	public:
diff --git a/cocos2dx/include/CCTMXObjectGroup.h b/cocos2dx/include/CCTMXObjectGroup.h
index 6ab4f3af43..09380dad09 100644
--- a/cocos2dx/include/CCTMXObjectGroup.h
+++ b/cocos2dx/include/CCTMXObjectGroup.h
@@ -1,7 +1,8 @@
 /****************************************************************************
 Copyright (c) 2010-2011 cocos2d-x.org
-Copyright (c) 2010      Ricardo Quesada
 Copyright (c) 2010      Neophit
+Copyright (c) 2010      Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
diff --git a/cocos2dx/include/CCTMXTiledMap.h b/cocos2dx/include/CCTMXTiledMap.h
index fb9df41a21..4447a2f3d3 100644
--- a/cocos2dx/include/CCTMXTiledMap.h
+++ b/cocos2dx/include/CCTMXTiledMap.h
@@ -1,6 +1,7 @@
 /****************************************************************************
 Copyright (c) 2010-2011 cocos2d-x.org
 Copyright (c) 2009-2010 Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
diff --git a/cocos2dx/include/CCTMXXMLParser.h b/cocos2dx/include/CCTMXXMLParser.h
index d5fdd50dc0..7c8159e069 100644
--- a/cocos2dx/include/CCTMXXMLParser.h
+++ b/cocos2dx/include/CCTMXXMLParser.h
@@ -1,6 +1,7 @@
 /****************************************************************************
 Copyright (c) 2010-2011 cocos2d-x.org
 Copyright (c) 2009-2010 Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
@@ -48,6 +49,7 @@ namespace cocos2d {
 		TMXLayerAttribNone = 1 << 0,
 		TMXLayerAttribBase64 = 1 << 1,
 		TMXLayerAttribGzip = 1 << 2,
+		TMXLayerAttribZlib = 1 << 3,
 	};
 
 	enum {
diff --git a/cocos2dx/include/CCTileMapAtlas.h b/cocos2dx/include/CCTileMapAtlas.h
index 240ca9bedc..cc60bdb8ae 100644
--- a/cocos2dx/include/CCTileMapAtlas.h
+++ b/cocos2dx/include/CCTileMapAtlas.h
@@ -1,6 +1,7 @@
 /****************************************************************************
 Copyright (c) 2010-2011 cocos2d-x.org
 Copyright (c) 2008-2010 Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
@@ -75,7 +76,7 @@ namespace cocos2d {
 	private:
 		void loadTGAfile(const char *file);
 		void calculateItemsToRender();
-		void updateAtlasValueAt(ccGridSize pos, ccColor3B value, int index);
+		void updateAtlasValueAt(ccGridSize pos, ccColor3B value, unsigned int index);
 		void updateAtlasValues();
 
 	protected:
diff --git a/cocos2dx/support/zip_support/ZipUtils.cpp b/cocos2dx/support/zip_support/ZipUtils.cpp
index 298de45534..96983e99b4 100644
--- a/cocos2dx/support/zip_support/ZipUtils.cpp
+++ b/cocos2dx/support/zip_support/ZipUtils.cpp
@@ -34,14 +34,13 @@ namespace cocos2d
 	// Should buffer factor be 1.5 instead of 2 ?
     #define BUFFER_INC_FACTOR (2)
 
-	int ZipUtils::inflateMemory_(unsigned char *in, unsigned int inLength, unsigned char **out, unsigned int *outLength)
+	int ZipUtils::ccInflateMemoryWithHint(unsigned char *in, unsigned int inLength, unsigned char **out, unsigned int *outLength, unsigned int outLenghtHint)
 	{
 		/* ret value */
 		int err = Z_OK;
 
-		/* 256k initial decompress buffer */
-		int bufferSize = 256 * 1024;
-		*out = new unsigned char[bufferSize];
+		int bufferSize = outLenghtHint;
+		*out = (unsigned char*) malloc(bufferSize);
 
 		z_stream d_stream; /* decompression stream */	
 		d_stream.zalloc = (alloc_func)0;
@@ -55,11 +54,10 @@ namespace cocos2d
 
 		/* window size to hold 256k */
 		if( (err = inflateInit2(&d_stream, 15 + 32)) != Z_OK )
-		{
 			return err;
-		}
 
-		for (;;) {
+		for (;;) 
+		{
 			err = inflate(&d_stream, Z_NO_FLUSH);
 
 			if (err == Z_STREAM_END)
@@ -67,28 +65,30 @@ namespace cocos2d
 				break;
 			}
 
-			switch (err) {
+			switch (err) 
+			{
 			case Z_NEED_DICT:
 				err = Z_DATA_ERROR;
 			case Z_DATA_ERROR:
 			case Z_MEM_ERROR:
 				inflateEnd(&d_stream);
 				return err;
-			}
+		    }
 
 			// not enough memory ?
 			if (err != Z_STREAM_END) 
 			{
-				delete [] *out;
-				*out = new unsigned char[bufferSize * BUFFER_INC_FACTOR];
+				unsigned char *tmp = (unsigned char*)realloc(*out, bufferSize * BUFFER_INC_FACTOR);
 
 				/* not enough memory, ouch */
-				if (! *out ) 
+				if (! tmp ) 
 				{
 					CCLOG("cocos2d: ZipUtils: realloc failed");
 					inflateEnd(&d_stream);
 					return Z_MEM_ERROR;
 				}
+				/* only assign to *out if tmp is valid. it's not guaranteed that realloc will reuse the memory */
+				*out = tmp;
 
 				d_stream.next_out = *out + bufferSize;
 				d_stream.avail_out = bufferSize;
@@ -96,16 +96,15 @@ namespace cocos2d
 			}
 		}
 
-
 		*outLength = bufferSize - d_stream.avail_out;
 		err = inflateEnd(&d_stream);
 		return err;
 	}
 
-	int ZipUtils::ccInflateMemory(unsigned char *in, unsigned int inLength, unsigned char **out)
+	int ZipUtils::ccInflateMemoryWithHint(unsigned char *in, unsigned int inLength, unsigned char **out, unsigned int outLengthHint)
 	{
 		unsigned int outLength = 0;
-		int err = inflateMemory_(in, inLength, out, &outLength);
+		int err = ccInflateMemoryWithHint(in, inLength, out, &outLength, outLengthHint);
 
 		if (err != Z_OK || *out == NULL) {
 			if (err == Z_MEM_ERROR)
@@ -133,6 +132,12 @@ namespace cocos2d
 		return outLength;
 	}
 
+	int ZipUtils::ccInflateMemory(unsigned char *in, unsigned int inLength, unsigned char **out)
+	{
+		// 256k for hint
+		return ccInflateMemoryWithHint(in, inLength, out, 256 * 1024);
+	}
+
 	int ZipUtils::ccInflateGZipFile(const char *path, unsigned char **out)
 	{
 		int len;
diff --git a/cocos2dx/support/zip_support/ZipUtils.h b/cocos2dx/support/zip_support/ZipUtils.h
index 98ee6b8e6b..133315db43 100644
--- a/cocos2dx/support/zip_support/ZipUtils.h
+++ b/cocos2dx/support/zip_support/ZipUtils.h
@@ -51,12 +51,25 @@ namespace cocos2d
 		* Inflates either zlib or gzip deflated memory. The inflated memory is
 		* expected to be freed by the caller.
 		*
+		* It will allocate 256k for the destination buffer. If it is not enought it will multiply the previous buffer size per 2, until there is enough memory.
 		* @returns the length of the deflated buffer
 		*
 		@since v0.8.1
 		*/
 		static int ccInflateMemory(unsigned char *in, unsigned int inLength, unsigned char **out);
 
+		/** 
+		* Inflates either zlib or gzip deflated memory. The inflated memory is
+		* expected to be freed by the caller.
+		*
+		* outLenghtHint is assumed to be the needed room to allocate the inflated buffer.
+		*
+		* @returns the length of the deflated buffer
+		*
+		@since v1.0.0
+		*/
+		static int ccInflateMemoryWithHint(unsigned char *in, unsigned int inLength, unsigned char **out, unsigned int outLenghtHint);
+
 		/** inflates a GZip file into memory
 		*
 		* @returns the length of the deflated buffer
@@ -74,7 +87,8 @@ namespace cocos2d
 		static int ccInflateCCZFile(const char *filename, unsigned char **out);
 
 	private:
-		static int inflateMemory_(unsigned char *in, unsigned int inLength, unsigned char **out, unsigned int *outLengh);
+		static int ccInflateMemoryWithHint(unsigned char *in, unsigned int inLength, unsigned char **out, unsigned int *outLength, 
+			unsigned int outLenghtHint);
 	};
 
 } // end of namespace cocos2d
diff --git a/cocos2dx/tileMap_parallax_nodes/CCParallaxNode.cpp b/cocos2dx/tileMap_parallax_nodes/CCParallaxNode.cpp
index 533ff00122..93b5b8b9b4 100644
--- a/cocos2dx/tileMap_parallax_nodes/CCParallaxNode.cpp
+++ b/cocos2dx/tileMap_parallax_nodes/CCParallaxNode.cpp
@@ -1,6 +1,7 @@
 /****************************************************************************
 Copyright (c) 2010-2011 cocos2d-x.org
 Copyright (c) 2009-2010 Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
@@ -69,14 +70,14 @@ namespace cocos2d {
 		pRet->autorelease();
 		return pRet;
 	}
-	void CCParallaxNode::addChild(CCNode * child, int zOrder, int tag)
+	void CCParallaxNode::addChild(CCNode * child, unsigned int zOrder, int tag)
 	{
         CC_UNUSED_PARAM(zOrder);
         CC_UNUSED_PARAM(child);
         CC_UNUSED_PARAM(tag);
 		CCAssert(0,"ParallaxNode: use addChild:z:parallaxRatio:positionOffset instead");
 	}
-	void CCParallaxNode::addChild(CCNode *child, int z, CCPoint ratio, CCPoint offset)
+	void CCParallaxNode::addChild(CCNode *child, unsigned int z, CCPoint ratio, CCPoint offset)
 	{
 		CCAssert( child != NULL, "Argument must be non-nil");
 		CCPointObject *obj = CCPointObject::pointWithCCPoint(ratio, offset);
diff --git a/cocos2dx/tileMap_parallax_nodes/CCTMXLayer.cpp b/cocos2dx/tileMap_parallax_nodes/CCTMXLayer.cpp
index 88d4b03d9e..b70310a7ef 100644
--- a/cocos2dx/tileMap_parallax_nodes/CCTMXLayer.cpp
+++ b/cocos2dx/tileMap_parallax_nodes/CCTMXLayer.cpp
@@ -1,6 +1,7 @@
 /****************************************************************************
 Copyright (c) 2010-2011 cocos2d-x.org
 Copyright (c) 2009-2010 Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
@@ -74,7 +75,7 @@ namespace cocos2d {
 
 			// mapInfo
 			m_tMapTileSize = mapInfo->getTileSize();
-			m_nLayerOrientation = mapInfo->getOrientation();
+			m_uLayerOrientation = mapInfo->getOrientation();
 
 			// offset (after layer orientation is set);
 			CCPoint offset = this->calculateLayerOffset(layerInfo->m_tOffset);
@@ -519,7 +520,7 @@ namespace cocos2d {
 	CCPoint CCTMXLayer::calculateLayerOffset(CCPoint pos)
 	{
 		CCPoint ret = CCPointZero;
-		switch( m_nLayerOrientation ) 
+		switch( m_uLayerOrientation ) 
 		{
 		case CCTMXOrientationOrtho:
 			ret = ccp( pos.x * m_tMapTileSize.width, -pos.y *m_tMapTileSize.height);
@@ -537,7 +538,7 @@ namespace cocos2d {
 	CCPoint CCTMXLayer::positionAt(CCPoint pos)
 	{
 		CCPoint ret = CCPointZero;
-		switch( m_nLayerOrientation )
+		switch( m_uLayerOrientation )
 		{
 		case CCTMXOrientationOrtho:
 			ret = positionForOrthoAt(pos);
@@ -581,7 +582,7 @@ namespace cocos2d {
 		unsigned int maxVal = 0;
 		if( m_bUseAutomaticVertexZ )
 		{
-			switch( m_nLayerOrientation ) 
+			switch( m_uLayerOrientation ) 
 			{
 			case CCTMXOrientationIso:
 				maxVal = (unsigned int)(m_tLayerSize.width + m_tLayerSize.height);
diff --git a/cocos2dx/tileMap_parallax_nodes/CCTMXObjectGroup.cpp b/cocos2dx/tileMap_parallax_nodes/CCTMXObjectGroup.cpp
index a3cbd0ce5d..baa57fafcf 100644
--- a/cocos2dx/tileMap_parallax_nodes/CCTMXObjectGroup.cpp
+++ b/cocos2dx/tileMap_parallax_nodes/CCTMXObjectGroup.cpp
@@ -1,7 +1,8 @@
 /****************************************************************************
 Copyright (c) 2010-2011 cocos2d-x.org
-Copyright (c) 2010      Ricardo Quesada
 Copyright (c) 2010      Neophit
+Copyright (c) 2010      Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
diff --git a/cocos2dx/tileMap_parallax_nodes/CCTMXTiledMap.cpp b/cocos2dx/tileMap_parallax_nodes/CCTMXTiledMap.cpp
index 0aaff71dbf..3d0e6e18dc 100644
--- a/cocos2dx/tileMap_parallax_nodes/CCTMXTiledMap.cpp
+++ b/cocos2dx/tileMap_parallax_nodes/CCTMXTiledMap.cpp
@@ -1,6 +1,7 @@
 /****************************************************************************
 Copyright (c) 2010-2011 cocos2d-x.org
 Copyright (c) 2009-2010 Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
@@ -154,9 +155,6 @@ namespace cocos2d{
 	
 	CCTMXTilesetInfo * CCTMXTiledMap::tilesetForLayer(CCTMXLayerInfo *layerInfo, CCTMXMapInfo *mapInfo)
 	{
-		CCTMXTilesetInfo *tileset = NULL;
-		//CFByteOrder o = CFByteOrderGetCurrent();
-
 		CCSize size = layerInfo->m_tLayerSize;
 		CCMutableArray<CCTMXTilesetInfo*>* tilesets = mapInfo->getTilesets();
 		if (tilesets && tilesets->count()>0)
@@ -197,7 +195,7 @@ namespace cocos2d{
 
 		// If all the tiles are 0, return empty tileset
 		CCLOG("cocos2d: Warning: TMX Layer '%@' has no tiles", layerInfo->m_sName.c_str());
-		return tileset;
+		return NULL;
 	}
 
 
diff --git a/cocos2dx/tileMap_parallax_nodes/CCTMXXMLParser.cpp b/cocos2dx/tileMap_parallax_nodes/CCTMXXMLParser.cpp
index ee6f456b23..510bf591b2 100644
--- a/cocos2dx/tileMap_parallax_nodes/CCTMXXMLParser.cpp
+++ b/cocos2dx/tileMap_parallax_nodes/CCTMXXMLParser.cpp
@@ -2,6 +2,7 @@
 Copyright (c) 2010-2011 cocos2d-x.org
 Copyright (c) 2011		Максим Аксенов 
 Copyright (c) 2009-2010 Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
@@ -391,10 +392,15 @@ namespace cocos2d {
 				{
 					layerAttribs = pTMXMapInfo->getLayerAttribs();
 					pTMXMapInfo->setLayerAttribs(layerAttribs | TMXLayerAttribGzip);
+				} else
+				if (compression == "zip")
+				{
+					layerAttribs = pTMXMapInfo->getLayerAttribs();
+					pTMXMapInfo->setLayerAttribs(layerAttribs | TMXLayerAttribZlib);
 				}
-				CCAssert( compression == "" || compression == "gzip", "TMX: unsupported compression method" );
+				CCAssert( compression == "" || compression == "gzip" || compression == "zlib", "TMX: unsupported compression method" );
 			}
-			CCAssert( pTMXMapInfo->getLayerAttribs() != TMXLayerAttribNone, "TMX tile map: Only base64 and/or gzip maps are supported" );
+			CCAssert( pTMXMapInfo->getLayerAttribs() != TMXLayerAttribNone, "TMX tile map: Only base64 and/or gzip/zlib maps are supported" );
 
 		} 
 		else if(elementName == "object")
@@ -534,17 +540,25 @@ namespace cocos2d {
 
 			std::string currentString = pTMXMapInfo->getCurrentString();
 			unsigned char *buffer;
-			len = base64Decode((unsigned char*)currentString.c_str(), currentString.length(), &buffer);
+			len = base64Decode((unsigned char*)currentString.c_str(), (unsigned int)currentString.length(), &buffer);
 			if( ! buffer ) 
 			{
 				CCLOG("cocos2d: TiledMap: decode data error");
 				return;
 			}
 
-			if( pTMXMapInfo->getLayerAttribs() & TMXLayerAttribGzip )
+			if( pTMXMapInfo->getLayerAttribs() & (TMXLayerAttribGzip | TMXLayerAttribZlib) )
 			{
 				unsigned char *deflated;
-				ZipUtils::ccInflateMemory(buffer, len, &deflated);
+				CCSize s = layer->m_tLayerSize;
+				// int sizeHint = s.width * s.height * sizeof(uint32_t);
+				int sizeHint = (int)(s.width * s.height * sizeof(unsigned int));
+
+				int inflatedLen = ZipUtils::ccInflateMemoryWithHint(buffer, len, &deflated, sizeHint);
+				assert(inflatedLen == sizeHint);
+
+				inflatedLen = (int)&inflatedLen; // XXX: to avoid warings in compiler
+				
 				delete [] buffer;
 				buffer = NULL;
 
diff --git a/cocos2dx/tileMap_parallax_nodes/CCTileMapAtlas.cpp b/cocos2dx/tileMap_parallax_nodes/CCTileMapAtlas.cpp
index 872f84af2b..3330e69a79 100644
--- a/cocos2dx/tileMap_parallax_nodes/CCTileMapAtlas.cpp
+++ b/cocos2dx/tileMap_parallax_nodes/CCTileMapAtlas.cpp
@@ -1,6 +1,7 @@
 /****************************************************************************
 Copyright (c) 2010-2011 cocos2d-x.org
 Copyright (c) 2008-2010 Ricardo Quesada
+Copyright (c) 2011      Zynga Inc.
 
 http://www.cocos2d-x.org
 
@@ -174,7 +175,7 @@ namespace cocos2d {
 
 		return value;	
 	}
-	void CCTileMapAtlas::updateAtlasValueAt(ccGridSize pos, ccColor3B value, int index)
+	void CCTileMapAtlas::updateAtlasValueAt(ccGridSize pos, ccColor3B value, unsigned int index)
 	{
 		ccV3F_C4B_T2F_Quad quad;