I typed a new pg_hba.conf from scratch without all the comments, i.e. only the connection strings, it worked.
Thank you 'Community'!
(Doh! My kids think I'm so smart because I work on computers, some day they'll discover the truth. Now to spend the afternoon backing up that data...)
The moral to this story is never let Notepad near anything you care about. If you have to use one of the MS apps to edit a text file use Wordpad, otherwise stick with Notepad++.