I see the same behavior with the JS error if using ICONBAR but not when using RIBBONBAR.  It does not happen on all my pages, however, and so far I have not been able to figure out what is different between the erroring and error-free pages.

With RIBBONBAR active I have another issue which is JQuery related.  I have a module containing jQuery 1.8.2 because I use a popup calendar that I believe is not in earlier jQuery versions.  Pages with my jQuery module receive a JS error (reporting that a function isn't defined or something like that).  The page appears to function more or less but in edit mode I attempt to delete a module on the page and the prompt that asks me to confirm the deletion shows 0 and 1 instead of No and Yes for my choices and neither one causes any action to take place.  I suppose that is a separate issue.  I have to admit I am quite confused by what I need to do now that DNN6 has jQuery embedded.  But I suppose that's being discussed elsewhere in these forums.

Bruce

this is a workaround that works for me (file: DDRActionsMenu.ascx):
script type="text/javascript">
(function ($) {
$(document).ready(function () {
try {
var msg = '<%= DotNetNuke.UI.Utilities.ClientAPI.GetSafeJSString(Localization.GetString("DeleteModule.Confirm"))%>';
var confirmString = "confirm('" + msg + "')";
$("a[href*=\"" + confirmString + "\"]").attr("href", function () {
return $(this).attr("href").replace(/if\(.+?\)\{(.+?)\}/, "$1"); //remove its original confirm function
}).dnnConfirm({
text: '<%= Localization.GetString("DeleteModule.Confirm"), Localization.SharedResourceFile %>',
yesText: '<%= Localization.GetString("Yes.Text", Localization.SharedResourceFile) %>',
noText: '<%= Localization.GetString("No.Text", Localization.SharedResourceFile) %>',
title: '<%= Localization.GetString("Confirm.Text", Localization.SharedResourceFile) %>'
});
}
catch (e) { }
});
} (jQuery));


maybe Confirm is not shown but all jquery code is executed ...