Okay, Blogger, are we cool now?

Yes, I really do have SFTP, and I would like to use that rather than plaintext FTP, if that's okay with you, Blogger.com. It is? Great!

I've fixed my RSS feed, again. Looks like Blogger and I were having some disagreements about relative path roots between SFTP and FTP entry points, and Blogger's error logging is supremely unhelpful in this regard.

Ah well, lesson learned.