I get the same error since the last update
I’m getting a scattered few reports of this, and I don’t currently know exactly why it’s happening; I haven’t been able to reproduce it. Is it on *all* posts/post types, only in specific contexts, etc.?
Based on another report, I believe that this is related to posts submitted on post types that are enabled for WP to Twitter but submitted from outside the WordPress admin; can either of you confirm this?
The same problem comes today
Security check failed is displayed when posting an NEW article.
Are you on the current release? I do not have any other reports of this issue.
Marking as resolved because the original issue is resolved.