The CF app certainly doesn't do that intentionally - it copies it from the archives. And if I look in the db on the cf app, it has the subject without the space as the field that it copied :O
the "subject" field in the db that we copy does not have the spaces... I honestly have no idea where they are coming from :O I'm guessing it must be something internally in the python libraries that create the MIME. Have you seen this with any other messages, that you can recall, or just this one?