Actualización

web/assets/modernizr/feature-detects/css-backgroundrepeat.js

@@ -0,0 +1,31 @@
+// developer.mozilla.org/en/CSS/background-repeat
+
+// test page: jsbin.com/uzesun/
+// http://jsfiddle.net/ryanseddon/yMLTQ/6/    
+
+(function(){
+
+
+function getBgRepeatValue(elem){
+    return (window.getComputedStyle ?
+             getComputedStyle(elem, null).getPropertyValue('background') :
+             elem.currentStyle['background']);
+}
+  
+
+Modernizr.testStyles(' #modernizr { background-repeat: round; } ', function(elem, rule){ 
+
+  Modernizr.addTest('bgrepeatround', getBgRepeatValue(elem) == 'round');
+
+});
+
+
+
+Modernizr.testStyles(' #modernizr { background-repeat: space; } ', function(elem, rule){ 
+
+  Modernizr.addTest('bgrepeatspace', getBgRepeatValue(elem) == 'space');
+
+});
+
+
+})();