I am getting a message on hitting the reply button...
"You are forbidden from posting 404 error"...or something like that...
When I delete cookies and reboot my router I can post straight away.
This leads me to believe that a Government agency or freelance hacker like NEX are blocking people via their I.P's.
That is the only explanation I can see for what is happening.
Please feel free to correct my paranoia...
It happened to me yesterday !