There’s a situation at the moment impacting on those contributors who also comment at the site. It doesn’t affect non-registered users who are still commenting as usual.
Basically, contributors coming in cold are getting a window telling them they’re impostors or suchlike, which is something we’re trying to get remedied a.s.a.p. It is happening as a result of an ongoing problem at the site.
The solution, if you’re a contributor, is to log-in for now when you comment. Whenever I come to the site, I log-in anyway so I can move around freely and for me it’s not an issue because it autofills so it’s just an extra click.
Email with further details is going out to contributors soon.
James for the Admins