As posted here http://wordpress.org/support/topic/close-but-not-polished?replies=3#post-4032749

[![Adobe Bucks][2]][1]

[1]: http://google.com/
[2]: http://google.com/logo.png

Causes the MarkDown to be corrupted and the following error:

Notice: Undefined index: linkID in /var/www/git/WP-MarkDown/markdownify/markdownify.php on line 412

The post previews fine so the problem lies in the HTML -> MarkDown converter.