Im using the ItemsRequested event to filter the contents of one combobox based on the selection in another. Evrything works fine in IE7 and Opera, but in Firefox (3) and Chrome, it doesnt work. Normally in the second combo I show a message that says 'loading' while the data is fetched via ajax without a full page postback, but in Firefox & Chrome, the ajax fetching mechanism just doest work. Has anyone else experienced this ? Is there a workaround ?