@cincyshopper
You can downgrade your wordpress-seo plugin. I used WordPress v3.5.1 and wordpess-seo v1.4.7 . When i update this plugin, i got the same problem u got.
If you are using WP v3.5.1, then i'll strongly recommend you to use Wordpress-SEO v1.4.7 with it.
Download your optional version from Wordpress.
And it is wise to keep backup your whole wordpress site and databases.
Thank you for your reply :)