In a previous episode, I was moaning that I couldn't get my DokuWiki RSS feed to display using the RSS parser - it was my wetware which was not up to the job!
I'd configured this Dokuwiki to disallow any anonymous access - and the RSS generator (feed.php) was correctly showing all the items which the anonymous user was allowed to see - i.e.none!
I didn't realise this until I'd downloaded the latest stable DokuWiki and ported the hacks I've applied to it, then patched my installation - which obviously did not fix the problem.
In the meantime, I've created a new user with read access to the entire wiki - then changed my RSS wiki syntax to pass the auth details:
Apologies to the DokuWiki team!