I had this problem during the migration from wicket 1.4 to wicket 1.5
The problems occurs under chrome, safari and wicket 1.5 Scenario with an AjaxEditableMultiLineLabel : 1. The user puts the focus on the AjaxEditableMultiLineLabel and edit the field. 2. Without focusing out of the editable label, the user clicks on another tab of chrome. => coming back to the first tab, the browser shows an "Access Denied Page". The log shows the warn : WARN - RequestListenerInterface - behavior not enabled; ignore call. Behavior org.apache.wicket.extensions.ajax.markup.html.AjaxEditableMultiLineLabel$5@18fa85at component [ [Component id = editor]] At that time, Martin proposed me a first workaround : http://markmail.org/message/uyjns2njjpo22xoj#query:+page:1+mid:laq7whb4urciyz6n+state:results The problem appeared again because of my migration to wicket 1.5.3. I tried to further analyze the problem. It seems that the AJAX call is done 2 times. When the user switches tabs chrome, the updating of the html triggers another onblur event and a new ajax call: Wicket.replaceOuterHtmlSafari = function(element, text) { // if we are replacing a single <script> element if (element.tagName == "SCRIPT") { // create temporal div and add script as inner HTML var tempDiv = document.createElement("div"); tempDiv.innerHTML = text; // try to get script content var script = tempDiv.childNodes[0].innerHTML; if (typeof(script) != "string") { script = tempDiv.childNodes[0].text; } element.outerHTML = text; <==== Trigger another blur event when the user has already changed of tab. try { eval(script); } catch (e) { Wicket.Log.error("Wicket.replaceOuterHtmlSafari: " + e + ": eval -> " + script); } return; }... As I'm not a javascript expert, does anybody know how to correct the problem in javascript instead of using a workaround? Thanks, Gaetan,