After deleting and recreating the "publishing service" in Lightroom, I was able to export a single photo. That's it. Doesn't work. Very similar to the Facebook publishing plugin, which does not work either.
Also, why do I have to wait for "downloading comments" and similar stuff? We have the web browser to interact with the website, only a fool is going to do it in Lightroom.
I'm wondering if the people designing and coding these things for Lightroom do actually ever get to use it. The answer obviously is no, because then they would know that their software doesn't work.
I should know, I'm a developer myself. And this is a very pathetic set of issues to have with a flagship software title.