Famous last words…
This morning, the video and photo folders have disappeared again.
*sigh*
[edit]
Think I’ve figured it out; it’s not an indexing problem, it’s to do with the media receiver type I set to enable high resolution artwork. Setting it to be a Naim streamer seems to tell Twonky to only present audio, which is pretty fair if the media renderer can only handle audio. Setting it to a generic media receiver presents all three types of media. i.e. I’d set the wrong Receiver Type profile, so it didn’t show me photos or videos.