There's a missing call in the plugin file
Fix is:
NB: I've since reworked the confirmation page plugin to use the Plugin helper.
"Fatal error: Call to a member function runPlugin() on a non-object in /var/xxx/xxxxx/components/com_chronocontact/plugins/cf_confirmation_page.php on line 173"
Fix is:
$MyCustomCode =& CFCustomCode::getInstance($MyForm->formrow->id);
$MyPlugins =& CFPlugins::getInstance($MyForm->formrow->id); // <-- add this line
if(JRequest::getVar('task') != 'beforeshow'){
NB: I've since reworked the confirmation page plugin to use the Plugin helper.