Using pluggin FBComment4Article on Joomla 1.6.1 for FaceBook comments on articles gives the error "Warning: urbanmadison.org/urban/welcome-to-urbanmadison-org/ is unreachable."

Clicking on this link (on UrbanMadison.org) gives a URL Linter page with an error message "Your og:type may only contain lowercase letters, _ and :. i.e. it must match [a-z_:]+" and lists the Input URL as "urbanmadison.org/urban/welcome-to-urbanmadison-org/"

I found an article said that the org:type should be something like "website".

I looked at he ArtioSEF meta data for this page and did not see any reference to org:type

I would reallly like to use this pluggin because I want feedback on articles and it helps advertise them on Facebook, but I need to get rid of this error.

If you go to urbanmadison.org (just setting it up), you can see the error.

Thanks!