I don't know what goes wrong, but occasionally I see that social medias don't take up the meta title and description of a post after it's shared on Facebook and Google+.
This does not happen to all posts, randomly posts. And once this is happening, it happens always. So, even if I share the post two days after it is published, the meta title and description is still empty, showing only the URL of the post.
Here is what it should normally look (and it does): http://d.pr/i/mQaA
Here is what it occasionally looks: http://d.pr/i/M3sG
I'm using All in One SEO Pack Plugin. I'm not sure if this problem is related to the plugin, but I would appreciate help.