diff -ru org/ajax4jsf/javascript/scripts/prototype.js org.new/ajax4jsf/javascript/scripts/prototype.js
--- org/ajax4jsf/javascript/scripts/prototype.js	2008-05-29 22:50:14.000000000 +0200
+++ org.new/ajax4jsf/javascript/scripts/prototype.js	2008-08-07 20:44:52.000000000 +0200
@@ -4337,15 +4337,17 @@
 	        for (var eventName in cache) {
 	        	var wrappers = cache[eventName];
 	        	var domEventName = Event.getDOMEventName(eventName);
-	        	
-	        	wrappers.each(function(wrapper) {
-					if (node.removeEventListener) {
-						node.removeEventListener(domEventName, wrapper, false);
-					} else {
-						node.detachEvent("on" + domEventName, wrapper);
-					}
-	            });            	
-	    		
+				
+	        	// NXP-2587: make sure wrappers is not null
+	        	if (wrappers) {
+	        		wrappers.each(function(wrapper) {
+	        			if (node.removeEventListener) {
+	        				node.removeEventListener(domEventName, wrapper, false);
+	        			} else {
+	        				node.detachEvent("on" + domEventName, wrapper);
+	        			}
+	        		});            	
+	        	
}
 	            cache[eventName] = null;
 	        }
 	
Seulement dans org.new/ajax4jsf/javascript/scripts: prototype.js~