Sorry - I thought I'd posted a reply already
The problem is that we have had to disable the email cloak plugin on the event details (AFTER being processed by the layout editor) because input fields for event registrations containing email addresses were getting broken
If you don't use RSVP Pro then copy the file components/com_jevents/views/default/helpers/defaultloadedfromtemplate.php to templates/YOURTEMPLATE/html/com_jevents/helpers/defaultloadedfromtemplate.php and change line c. 1723 from
$template_value = str_replace("@", "@£@", $template_value);
to
// $template_value = str_replace("@", "@£@", $template_value);