application/js/field/image.js in spontaneous-0.2.0.beta7 vs application/js/field/image.js in spontaneous-0.2.0.beta8

@@ -158,11 +158,11 @@
 				this.spinner().indeterminate();
 
 				if (files.length > 0) {
 					this.select_files(files);
 					var file = files[0],
-					url = window.URL.createObjectURL(file)
+					url = this.createObjectURL(file)
 					, image = this.image;
 					this._edited_value = url;
 					image.__start_upload = true;
 					image.bind('load', function() {
 						if (this.image.__start_upload) {
@@ -175,12 +175,10 @@
 						} else {
 							// container.removeClass('landscape');
 						}
 					}.bind(this));
 					image.attr('src', url);
-					// see http://www.htmlfivewow.com/slide25
-					window.URL.revokeObjectURL(url);
 				}
 				return false;
 			}.bind(this);
 
 			var drag_enter = function(event) {
@@ -304,16 +302,15 @@
 				set_dimensions(width, height);
 			};
 
 			var files_selected = function(files) {
 				if (files.length > 0) {
-					var file = files[0], url = window.URL.createObjectURL(file);
+					var file = files[0], url = this.createObjectURL(file);
 					img.attr('src', url).removeClass('empty');
 					this.select_files(files);
 					img.attr('src', url);
 					this._edited_value = url;
 					this.image.attr('src', url);
-					window.URL.revokeObjectURL(url);
 					set_info(File.filename(file), file.fileSize, null, null);
 				}
 			}.bind(this);
 
 			var onchange = function() {