Share on Facebook does not show thumbnail images

Posted by matt_tm on Pro Webmasters See other posts from Pro Webmasters or by matt_tm
Published on 2010-11-18T13:36:20Z Indexed on 2011/03/10 0:19 UTC
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I have a PHP application which has a "Share on Facebook" button that,

  • On the development server shows the thumbnail images correctly and allows the user to select between them

  • On the live server, it does NOT show the thumbnail images at all.

The relevant portion of the .htaccess file is:

# Set up caching on media files for 2 days
<FilesMatch "\.(gif|jpg|jpeg|png|flv)$">
ExpiresDefault A172800
Header append Cache-Control "public"
</FilesMatch>

I'm using the exact same set of php files and .htaccess, but the server configuration is different.

What could be causing this? Note that the text appears fine.

Edit1

We are also doing some URL rewriting related to images in the .htaccess (on both servers):

...
RewriteRule ^.*/content/image/(.*)$ content/image/$1 [L]
...
RewriteRule ^.*/images/(.*)$ images/$1 [L]
...

Would that be somehow making a difference? Images appear fine all throughout the site.

(I posted this question earlier as http://stackoverflow.com/questions/4142597/share-on-facebook-does-not-show-thumbnail-images) )

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