Two days ago: when I manually pasted my blog URL into my facebook status I would get the title and the summary with the option to select a thumbnail from the blog posting.
Yesterday: I downloaded the Share and Follow plugin.
Today: When I cut and paste the blog URL into my facebook status I get a generic gravatar and a bunch of code.
I tried to deactivate and uninstall the plugin, but the problem still persists. I am able to copy and paste links from other websites into my facebook status without a problem, so it seems like a problem with my wordpress blog (and the way the facebook is communicating with it).