Phil,
I'm glad to hear you're liking things so far. Facebook is constantly updating their application area, and we're always trying to keep up. The most recent updates from them haven't been incorporated into our documentation, but we're hoping to update everything soon.
For the image size error, please check the image you've specified. If it's being set automatically by JFBConnect, you'll want to add a specific tag to your page with a larger image, like:
{SCOpenGraph image=http://yoursite.com/path-to-image.jpg}The image you specify should be a direct link to the image (no redirects) and should be larger than 200x200 px. I'm not sure what you mean by:
a simple route like /images but same result.
Mismatch og:url and canonical url og:url tag in the header is not the same URL as rel='canonical' link in the html.
This means that there is some extension setting a <link rel="canonical" href="..." /> tag on your page and that URL is different than the URL that JFBConnect is setting for the page. JFBConnect should be using the current URL. You'd need to investigate why the canonical URL is different and determine if that should be different. Usually, that's not the case, but let us know if it is.
I hope that helps get you started, but if not, let me know.
Thanks,
Alex
(#100) Only one of reference objects can be specified for type
