I’ve been plagued with this problem for about two weeks now. I could write a post, I could publish it: but it would never show the information in the content field. The only thing that would publish would be the title, the tags and the categories. I could write comments and I could even delete entire posts: but I just couldn’t edit them. If I went into the edit field, I could type but once I clicked save the edits would dissappear.
Another sign of this problem was that I couldn’t switch to code mode: it was always stuck on visual editor. After some heavy searching I found two fixes, one safer than the other.