Conflict with the very popular WordPress SEO by Yoast

[OC2PS]

Please refer to

 http://wordpress.org/support/topic/plugin-wordpress-seo-by-yoast-title-metas-empty-tabs

 http://wordpress.org/support/topic/plugin-all-in-one-event-calendar-conflict-with-yoast-seo-plugin

 http://wordpress.org/support/topic/plugin-wordpress-seo-by-yoast-this-is-a-yoast-test-title-1

After upgrading to latest version, all my page titles are changed to "This is a Yoast Test Title" and the "Titles & Metas" tab in backend is completely blank.

The admin page ("Titles & Metas" tab) is .

Originally I had filled in the relevant fields. But now I don't even see the fields.

for some reason the page titles&metas includes scripts from the ai1ec plugin. jquery.timespan.js cuases a javascript error Uncaught TypeError?: Cannot read property 'checked' of undefined.