Whenever posting, I get following text displayed in the text field:

<br />

<b>Warning</b>:  mysql_real_escape_string() expects parameter 2 to be resource, object given in <b>/hosting/sites/http://ww2.vegetarisme.be/htdocs/components/com_comment/joscomment/utils.php</b> on line <b>678</b><br />

<br />

<b>Warning</b>:  mysql_real_escape_string() expects parameter 2 to be resource, object given in <b>/hosting/sites/http://ww2.vegetarisme.be/htdocs/components/com_comment/joscomment/utils.php</b> on line <b>678</b><br />

<?xml version="1.0" standalone="yes"?><post><id>captchaalert</id><captcha><![CDATA[<a title="clic to reload a new image" href='javascript:JOSC_reloadCaptcha()'><img src="/http://ww2.vegetarisme.be/components/com_comment/joscomment/captcha.php?refid=ffa084c5b7c9d05388b2cb786a6ddbb3" alt="Security Image" />

<input type="hidden" name="security_refid" value="ffa084c5b7c9d05388b2cb786a6ddbb3" /></a>]]></captcha><noerror>1</noerror></post>

I guess it's not the warnings that matter..although maybe the warning disable the xml from being captured?

And yes, I 've changed the template, but when I put the old files back, it stays the same, even after refreshing the whole page.
Help much appreciated.

( e.g. http://ww2.vegetarisme.be/index.php?option=com_content&view=article&id=42&Itemid=131 )