[Plugin: WordPress SEO by Yoast] og:description shows the whole post

I just installed this plugin on my site and when I enable Social settings, its adds the whole content in the og:description meta tag! :

<meta property="og:description" content="[caption id="attachment_29521" align="alignleft" width="175" caption="WinOptimizer 9"][/caption]
Ashampoo have just released a major update to their famous WinOptimizer. A great set of tools which can make sure that your computer stays in top shape! The latest version of this software will make things much more easier and powerful. Some new tools, a brand new design and many tweaks make this a very special release...
Like TuneUp, Advanced System Care and System Mechanic, Ashampoo WinOptimizer is one of the top in the system utility industry. In the past few years, their flagship product started to change from WinOptimizer to their powerful Burning Studio which I like more than Nero. But with this new release, I think things will change again!
If im correct, most of the previous WinOptimizers had glassy looks. Actually, It was too much for me. But the new WinOptimizer 9 is super cool. Normally, Ashampoo have several themes for you to pick. But, I really like the default design. Now its well-organized and clean.
Unlike most of the other utilities, Ashampoo starts the scan automatically as soon as we launch the program and if I can remember correctly, they do it faster than the others. In the home screen, you can find a quick overview of your machine. Maintenance tasks that need your attention, System status, a CPU and a Memory monitor and some other options were nicely organized in your home screen.

[caption id="attachment_29521" align="aligncenter" width="340" caption="WinOptimizer 9"][/caption]
If you want to experience the full power of the suit, switch to the "Modules" tab and it have a lot of tools which can optimize every part of your machine...

[caption id="attachment_29531" align="aligncenter" width="340" caption="The Modules"][/caption]
In this new release, the Registry Defragment and the HDD Inspector tools are new. Registry Defrag is one popular tool that many others have started to implement. It can give a good boost if your system is too fragmented.

[caption id="attachment_29532" align="aligncenter" width="340" caption="Registry Defrag"][/caption]
The HDD Inspector is something rare. Normally, it comes as a separate tool. But Ashampoo have it built into the system. It's not a tool which run disk scans. This tool can analyze data taken from your hard drive including S.M.A.R.T data and check the health of the disks. Oh, I have some bad sectors... Thanks a lot Ashampoo!

[caption id="attachment_29530" align="aligncenter" width="340" caption="HDD Inspector"][/caption]
I should say that Ashampoo have done a great job with their new app. A very user-friendly and a clean design which have combined a lot of powerful tools together! The feature I like most in this new version is the HDD Inspector which just drew my attention towards a big problem in my disk! So, what do you think? Don't you want to try it out? We have 10 keys just for you!

Give Away :
Leaving a Blog post comment is mandatory! I see that many people have opted it and never left a comment! Use the box below to enter the giveaway and Scroll down to the bottom of the site and you’ll see the comment area! Leave a comment there stating why you need Ashampoo WinOptimizer and get more points by completing the other tasks. More tasks you complete, more chance you have! Otherwise, all other entries will be rejected!"/>

How can I fix this?

http://wordpress.org/extend/plugins/wordpress-seo/