Hi and thank you for this great plugin. I am not sure if this has been asked before. But when I upgraded to WordPress 3.5 I noticed that Yoast WordPress SEO: Titles & Metas tab on the back end, it displayed a blank screen. If I disable All in One Event Calendar, Yoast WordPress SEO: Titles & Metas tab displays the information again.
I am not sure who needs to fix this issue whether it is you or Yoast?
Thank you for your time.