1) Very glad to hear that 4.0.2 worked for you. It was a tricky bug, and glad it seems we stomped it out.
2) Not sure why it's not automatically showing up. Please make sure:
* You're in the article view.. not a blog view, as you have it set to only show in article views
* The JFBCContent plugin is enabled
* Finally, try setting the Frontpage, Section, and Category view settings to show the comment box at the bottom, just to test. If it works, that will help narrow things down.
3) When you specify an href in the {JFBCComments} tag, all tags with that href will be the same, even if on different pages. The href should either be the final destination URL of the article. If you don't specify it, the URL will be for the 'current' page it's displayed on, which may work if you only let the comment box be shown when in an article.
4) You can administer the comments on the page itself, if you are the Facebook Administrator of the app and logged in. There should be a "moderate" link under each comment. Alternatively, you can moderate in the Comment Moderation Tool:
developers.facebook.com/tools/comments
5) The picture comes from Open Graph tags. In the Social configuration -> Open Graph area of JFBConnect, you can set it to automatically fetch the first image from an article to use. Alternatively, you can specify the image for each article/page individually by adding the following tag to the page:
{JFBCGraph image=http://site.com/link-to-image.jpg}Please note, updating Open Graph tags can take 1-3 days for Facebook to notice the change.
Hope that all helps!
Alex