Whenever I post my blog to my wall on Facebook, it posts sans thumbnail or description. The thumbnail is just completely missing, and the description reads "Your Blog Description...". I added meta tags into my code for the thumbnail AND to change the description, but it still stays the same. I even searched my Page Source for the string "Your Blog Description", and it doesn't show up ANYWHERE in the HTML. How can it still be pulling no thumbnail and that non-existent description to Facebook?