diff --git a/src/event.js b/src/event.js
index 4bf96fca1..5be849f56 100644
--- a/src/event.js
+++ b/src/event.js
@@ -521,27 +521,30 @@ function bindReady(){
 	if ( readyBound ) return;
 	readyBound = true;
 
-	// Mozilla, Opera (see further below for it) and webkit nightlies currently support this event
-	if ( document.addEventListener && !jQuery.browser.opera)
+	// Mozilla, Opera and webkit nightlies currently support this event
+	if ( document.addEventListener ) {
 		// Use the handy event callback
-		document.addEventListener( "DOMContentLoaded", jQuery.ready, false );
+		document.addEventListener( "DOMContentLoaded", function(){
+			document.removeEventListener( "DOMContentLoaded", arguments.callee, false );
+			jQuery.ready();
+		}, false );
 
 	// If IE event model is used
-	if ( document.attachEvent )
+	} else if ( document.attachEvent ) {
 		// ensure firing before onload,
 		// maybe late but safe also for iframes
-		document.attachEvent("onreadystatechange", function(e) {
-			if ( document.readyState == "complete" ) {
-				document.detachEvent("onreadystatechange", arguments.callee );
+		document.attachEvent("onreadystatechange", function(){
+			if ( document.readyState === "complete" ) {
+				document.detachEvent( "onreadystatechange", arguments.callee );
 				jQuery.ready();
 			}
 		});
 
-	// If IE and not an iframe
-	if ( document.documentElement.doScroll && !window.frameElement )
+		// If IE and not an iframe
 		// continually check to see if the document is ready
-		(function(){
-			if (jQuery.isReady) return;
+		if ( document.documentElement.doScroll && !window.frameElement ) (function(){
+			if ( jQuery.isReady ) return;
+
 			try {
 				// If IE is used, use the trick by Diego Perini
 				// http://javascript.nwbox.com/IEContentLoaded/
@@ -550,36 +553,7 @@ function bindReady(){
 				setTimeout( arguments.callee, 0 );
 				return;
 			}
-			// and execute any waiting functions
-			jQuery.ready();
-		})();
 
-	if ( jQuery.browser.opera )
-		document.addEventListener( "DOMContentLoaded", function () {
-			if (jQuery.isReady) return;
-			for (var i = 0; i < document.styleSheets.length; i++)
-				if (document.styleSheets[i].disabled) {
-					setTimeout( arguments.callee, 0 );
-					return;
-				}
-			// and execute any waiting functions
-			jQuery.ready();
-		}, false);
-
-	if ( jQuery.browser.safari ) {
-		var numStyles;
-		(function(){
-			if (jQuery.isReady) return;
-			if ( document.readyState != "loaded" && document.readyState != "complete" ) {
-				setTimeout( arguments.callee, 0 );
-				return;
-			}
-			if ( numStyles === undefined )
-				numStyles = jQuery("style, link[rel=stylesheet]").length;
-			if ( document.styleSheets.length != numStyles ) {
-				setTimeout( arguments.callee, 0 );
-				return;
-			}
 			// and execute any waiting functions
 			jQuery.ready();
 		})();