Why is Facebook not reading OpenGraph Tags in my page?

Question

I have a page I am developing with OpenGraph tags: http://william-j-bennett-iii-dds.nationaldentalreviews.org/?qRID=252851

The tags are correctly picked up by other Opengraph page crawlers.

But the Facebook page crawlers are not picking up the same data.

Is there an error in my Opengraph Tags that I can fix? Or is there an error with FBs process?

UPDATE 10/3: Let me clarify, here are the OpenGraph tags as they are parsed by the parser on "opengraph[DOT]in":
og:site_name: Aesthetic Dentistry
og:title: We're so grateful for good reviews from our customers. Here's another:
og:type: profile
og:url: http://william-j-bennett-iii-dds[DOT]nationaldentalreviews[DOT]org
og:image: http://www[DOT]nationaldentalreviews[DOT]org/Images/StarRating5_119x50.png

Answer 1

The problem is that Facebook requires all OpenGraph meta tags parameters, although they're not strictly required by OpenGraph itself. You strictly need to specific the og:url and the og:title meta tags

Answer 2

There is an error in Facebook Linter for url you provided about missing og:url and og:type properties (both are required by Facebook)

Answer 3

One other problem is that your OG markup differs between these two URLs:

http://william-j-bennett-iii-dds.nationaldentalreviews.org/?qRID=252851

and

http://william-j-bennett-iii-dds.nationaldentalreviews.org/

In the first URL you specify og:url as pointing to the latter URL - so the Facebook crawlers follow that link - you need to ensure the markup on the second URL is correct.

Answer 4

There is a fundamental problem in that the Facebook scraper does not follow standard XML syntax. Standard syntax is that ALL attributes must be quoted. Facebook is not allowing quoted attributes and not allowing self-closing elements.