diff --git a/jquery.retina.js b/jquery.retina.js
index 13c3aba..2c62f37 100644
--- a/jquery.retina.js
+++ b/jquery.retina.js
@@ -1,29 +1,33 @@
 /*
 	Author: Troy Mcilvena (http://troymcilvena.com)
 	Twitter: @mcilvena
-	Date: 27 August 2010
-	Version: 1.1
+	Date: 10 November 2010
+	Version: 1.2
 	
 	Revision History:
 		1.0 (23/08/2010)	- Initial release.
 		1.1 (27/08/2010)	- Made plugin chainable
+		1.2 (10/11/2010)	- Fixed broken retina_part setting. Wrapped in self executing function (closure)
 */
 
-jQuery.fn.retina = function(retina_part) {
-	// Set default retina file part to '-2x'
-	// Eg. some_image.jpg will become some_image-2x.jpg
-	var settings = {'retina_part': '-2x'};
-	if(retina_part) jQuery.extend(config, settings);
-		
-	if(window.devicePixelRatio >= 2) {
-		this.each(function(index, element) {
-			if(!$(element).attr('src')) return;
-			
-			var new_image_src = $(element).attr('src').replace(/(.+)(\.\w{3,4})$/, "$1"+ settings['retina_part'] +"$2");
-			$.ajax({url: new_image_src, type: "HEAD", success: function() {
-				$(element).attr('src', new_image_src);
-			}});
-		});
+(function( $ ){
+	$.fn.retina = function(retina_part) {
+		// Set default retina file part to '-2x'
+		// Eg. some_image.jpg will become some_image-2x.jpg
+		var settings = {'retina_part': '-2x'};
+		if(retina_part) jQuery.extend(settings, { 'retina_part': retina_part });
+
+		if(window.devicePixelRatio >= 2) {
+			this.each(function(index, element) {
+				if(!$(element).attr('src')) return;
+
+				var new_image_src = $(element).attr('src').replace(/(.+)(\.\w{3,4})$/, "$1"+ settings['retina_part'] +"$2");
+				$.ajax({url: new_image_src, type: "HEAD", success: function() {
+					$(element).attr('src', new_image_src);
+				}});
+			});
+		}
+		return this;
 	}
-	return this;
-}
\ No newline at end of file
+})( jQuery );
+