LATEST UPDATE (June 13th 2012)
I can't figure out what's wrong with my codes. When I want to share one of my blog posts and use either the Facebook share button or copy the link of the blog post directly into Facebook all that pops up is the URL itself, not the meta info such as description or featured image! I filled out the meta data for each and every post and I also added Open Graph to my code.
Yet, when I try to share my blog post links on Facebook, neither the meta description nor a thumbnail would show up for the majority of my blog posts. It's like something is blocking the information. I've run out of ideas. I really hope you guys can help me figure out what's wrong! (obvioulsy I replaced the fillers above with my own data!)
I also used the Facebook Debugger and all it tells me is:
Can't Download: Could not retrieve data from URL.
I finally was able to figure out what was wrong thanks to Milo and MathSmath! The W3 Cache Plugin is interfering with the Facebook sharing progress, but it's quite easy to change that. Scroll down to see my answer! Works like a charm!