You can add this code to the document to get some statistics:
MySQL: [^qt^], [^q^] request(s), PHP: [^p^], total: [^t^], document retrieved from [^s^].
Also adding a <base> is a good idea in MODx sites to keep the relative links in order (don’t think that this would cause your problem but figured I would mention it). Add this to your <head> section:
<base href="[(site_url)]" />