Yes!! Multi-thumbnails with MediaRSS worked! Look! :) - directeur

Hurray, now I can fix my code :-) <media:group><media:thumbnail /></media:group> got it - Jason Wehmhoener

What did you do? - Dave Winer

Dave: Every media:thumbnail wrapped with media:group AND specified the width and height of thumbnails. - directeur

Dave and Paul: Tell me, btw, is content-length that "required" for audio enclosures? I mean, the doc says so, but I see that friendfeed, my desktop feed reader and google reader do without it. (It takes me a headers fetch in my blog to include an enclosure, and I'll be happy if I haven't to fetch the content's length for every enclosure :) - directeur

Congrats, You did it! - Michael Fidler

directeur: Like the others you mention, we don't strictly require content-length, but will pass it on to your outgoing rss if we have it. - Casey Muller

Casey, thanks for the details. So, I'll just "ignore" the content-length on my side too, or put a random value to make the feed validate. - directeur