Unable to edit or view mail_html body's

It looks like this for me, out of the box: http://share.aidanlister.com/MJHC

I've hunted around, and I think I see the problem. I'm not sure what "text_format" is, I cannot find it defined anywhere in the variable module. I see that the mail_text type uses "text" for the field, which looks correct if you want the previews displayed in HTML. If you want the previews displayed escaped, then use "string".

index 9a9dd2a..3eeac05 100644
--- a/sites/all/modules/contrib/variable_email/variable_email.variable.inc
+++ b/sites/all/modules/contrib/variable_email/variable_email.variable.inc
@@ -25,7 +25,7 @@ function variable_email_build_mail_html($variable, $options = array()) {
   $name = str_replace('[mail_part]', '', $variable['name']);
   // For mail text, children have different types
   $variable['children'][$name . 'subject']['type'] = 'string';
-  $variable['children'][$name . 'body']['type'] = 'text_format';
+  $variable['children'][$name . 'body']['type'] = 'text';
   $variable = variable_build_multiple($variable, $options);
   return $variable;
 }