I was having problems with a new install of WordPress Seo by Yoast. After entering the Focus Keyword and other details for a given post and clicking Update the fields would empty themselves and be unrecognised on the Page Analysis page. They are, however, recorded on the main Pages -> All Pages page in a column.
I disabled my other plugins and that fixed the problem. Everything works fine, great in fact. The offending other plugin turned out to be Related –
My problem is that someone has already spent a lot of time setting up the related posts plugin so I don’t want to just get rid of that and lose all their work. On the other hand I really like the Yoast plugin.
Could anyone point me where to look that would be causing this problem?