Excellent, after manually removing the offending code:
$MailBody = $MailBody . "<html><head><!-- In\"+\"stanceBegin template=\"/Templates/waue html body\" codeOutsideHTMLIsLocked=\"false\" --><!-- In\"+\"stanceBeginEditable name=\"emailhead\" --><!-- In\"+\"stanceBegin template=\"/Templates/waue html body\" codeOutsideHTMLIsLocked=\"false\" --><!-- In\"+\"stanceBeginEditable name=\"emailhead\" --><!-- In\"+\"stanceBegin template=\"/Templates/waue html body\" codeOutsideHTMLIsLocked=\"false\" --><!-- In\"+\"stanceBeginEditable name=\"emailhead\" --><!-- In\"+\"stanceEndEditable --><!-- In\"+\"stanceEndEditable --><!-- In\"+\"stanceEndEditable --></head><body><!-- In\"+\"stanceBeginEditable name=\"emailbody\" --><!-- In\"+\"stanceBeginEditable name=\"emailbody\" -->\r\n";
$MailBody = $MailBody . "<p>\r\n";
$MailBody = $MailBody . " <!-- In\"+\"stanceBeginEditable name=\"emailbody\" -->\r\n";
If you open the Behaviour again it comes back.
CSS menu writer has the exact same problem. When you manually fix things that should have worked in the first place if you have to go back into the tool it will overwrite all of your customizations.
Really, why is any of that code necessary?
