I'm on 7.5.
EDIT: A more serious issue is that email templates with attachments do not send with the attachment
In Email.js there is the line of code: index.php?module=EmailTemplates&action=AttachDocuments.
However, AttachDocuments is nowhere to be found in the codebase. If you try that URL in your browser, it will say action not found.
Should this line of code be calling another action instead?