Expose jQuery.uuid (use with caution) and make sure the expando property is used in the events module.

src/data.js

@@ -1,9 +1,13 @@
-var expando = "jQuery" + jQuery.now(), uuid = 0, windowData = {};
+var windowData = {};
 
 jQuery.extend({
 	cache: {},
 
-	expando: expando,
+	// Please use with caution
+	uuid: 0,
+
+	// Unique for each copy of jQuery on the page	
+	expando: "jQuery" + jQuery.now(),
 
 	// The following elements throw uncatchable exceptions if you
 	// attempt to add expando properties to them.
@@ -36,7 +40,7 @@ jQuery.extend({
 
 		// Compute a unique ID for the element
 		} else if ( !id ) {
-			elem[ jQuery.expando ] = id = ++uuid;
+			elem[ jQuery.expando ] = id = ++jQuery.uuid;
 		}
 
 		// Avoid generating a new cache unless none exists and we

src/event.js

@@ -270,7 +270,7 @@ jQuery.event = {
 		if ( !bubbling ) {
 			event = typeof event === "object" ?
 				// jQuery.Event object
-				event[expando] ? event :
+				event[ jQuery.expando ] ? event :
 				// Object literal
 				jQuery.extend( jQuery.Event(type), event ) :
 				// Just the event type (string)
@@ -428,7 +428,7 @@ jQuery.event = {
 	props: "altKey attrChange attrName bubbles button cancelable charCode clientX clientY ctrlKey currentTarget data detail eventPhase fromElement handler keyCode layerX layerY metaKey newValue offsetX offsetY originalTarget pageX pageY prevValue relatedNode relatedTarget screenX screenY shiftKey srcElement target toElement view wheelDelta which".split(" "),
 
 	fix: function( event ) {
-		if ( event[ expando ] ) {
+		if ( event[ jQuery.expando ] ) {
 			return event;
 		}
 
@@ -557,7 +557,7 @@ jQuery.Event = function( src ) {
 	this.timeStamp = jQuery.now();
 
 	// Mark it as fixed
-	this[ expando ] = true;
+	this[ jQuery.expando ] = true;
 };
 
 function returnFalse() {