[Plugin: WordPress SEO by Yoast] pugin does not work

WordPress version:3.3.2
WordPress SEO version:1.2.2

Since I downloaded the plugin yesterday I cant open and edit some of my pages in WP admin section. I deactivated other plugins but it did not help. Strange that some of my pages and posts could be opened and edited and some of them not. If I deactivate SEO plugin everything works properly again. Does author of the plugin plann to fix it soon or shall I rather download another SEO plugin? https://www.manufactura.cz

https://www.ads-software.com/extend/plugins/wordpress-seo/