[NG] Mehrere Probleme nach Upgrade von 1.8.10 auf 1.8.15

Code:
<link rel="alternate" type="application/rss+xml" title="{$lang->latest_threads} (RSS 2.0)" href="{$mybb->settings['bburl']}/syndication.php" />

<link rel="alternate" type="application/atom+xml" title="{$lang->latest_threads} (Atom 1.0)" href="{$mybb->settings['bburl']}/syndication.php?type=atom1.0" />

<meta http-equiv="Content-Type" content="text/html; charset={$charset}" />

<meta http-equiv="Content-Script-Type" content="text/javascript" />

<script type="text/javascript" src="{$mybb->asset_url}/jscripts/jquery.js?ver=1813"></script>

<script type="text/javascript" src="{$mybb->asset_url}/jscripts/jquery.plugins.min.js?ver=1813"></script>

<script type="text/javascript" src="{$mybb->asset_url}/jscripts/general.js?ver=1815"></script>



<link type="text/css" rel="stylesheet" href="cache/themes/global/thanks/thx.css" />

<script type="text/javascript" src="jscripts/thx.js"></script>

{$stylesheets}

<script type="text/javascript">

<!--

lang.unknown_error = "{$lang->unknown_error}";



lang.select2_match = "{$lang->select2_match}";

lang.select2_matches = "{$lang->select2_matches}";

lang.select2_nomatches = "{$lang->select2_nomatches}";

lang.select2_inputtooshort_single = "{$lang->select2_inputtooshort_single}";

lang.select2_inputtooshort_plural = "{$lang->select2_inputtooshort_plural}";

lang.select2_inputtoolong_single = "{$lang->select2_inputtoolong_single}";

lang.select2_inputtoolong_plural = "{$lang->select2_inputtoolong_plural}";

lang.select2_selectiontoobig_single = "{$lang->select2_selectiontoobig_single}";

lang.select2_selectiontoobig_plural = "{$lang->select2_selectiontoobig_plural}";

lang.select2_loadmore = "{$lang->select2_loadmore}";

lang.select2_searching = "{$lang->select2_searching}";



var cookieDomain = "{$mybb->settings['cookiedomain']}";

var cookiePath = "{$mybb->settings['cookiepath']}";

var cookiePrefix = "{$mybb->settings['cookieprefix']}";

var cookieSecureFlag = "{$mybb->settings['cookiesecureflag']}";

var deleteevent_confirm = "{$lang->deleteevent_confirm}";

var removeattach_confirm = "{$lang->removeattach_confirm}";

var loading_text = '{$lang->ajax_loading}';

var saving_changes = '{$lang->saving_changes}';

var use_xmlhttprequest = "{$mybb->settings['use_xmlhttprequest']}";

var my_post_key = "{$mybb->post_code}";

var rootpath = "{$mybb->settings['bburl']}";

var imagepath = "{$theme['imgdir']}";

  var yes_confirm = "{$lang->yes}";

var no_confirm = "{$lang->no}";

var MyBBEditor = null;



function dismissANN(id)

{

if(!$("Ann_"+id))

{

return false;

}



if(use_xmlhttprequest != 1)

{

return true;

}



new Ajax.Request("index.php?action=ann_dismiss", {method: "post", postBody: "ajax=1&my_post_key="+my_post_key+"&id="+id});

Element.remove("Ann_"+id);

return false;

}

var spinner_image = "{$theme['imgdir']}/spinner.gif";

var spinner = "<img src='" + spinner_image +"' alt='' />";

// -->

</script>