No need to set returnValue if preventDefault exists. Thanks kangax for the catch.

diff --git a/src/event.js b/src/event.js
index 5e72aaa..1fec18c 100644 (file)
--- a/src/event.js
+++ b/src/event.js
@@ -583,9 +583,11 @@ jQuery.Event.prototype = {
                // if preventDefault exists run it on the original event
                if ( e.preventDefault ) {
                        e.preventDefault();
-               }
+
                // otherwise set the returnValue property of the original event to false (IE)
-               e.returnValue = false;
+               } else {
+                       e.returnValue = false;
+               }
        },
        stopPropagation: function() {
                this.isPropagationStopped = returnTrue;