Check out this URL:
http://developers.facebook.com/tools/debug/og/object?q=www.linuxstall.com
Everything is fine except the last line which is
Note: “Reference in Perl” is the most recent post at my site.
When I share any of my post on facebook then it works fine but when I share the homepage (www.linuxstall.com) then it shows most recent post’s description instead of the site’s description.
What is the reason of that? How can I correct that?
I have configured open graph using YOAST.
See the screenshot. It is showing “Reference in Perl” as a description.
In the source code I see two og:description meta tags. The first and correct one seems to be coming from your Yoast WordPress SEO Plugin. The other one is outside the plugin’s block, so I guess it’s defined elsewhere.
Check your theme if it includes that meta tag. If not, check your other plugins. Disable them one by one to find the culprit.