@rorie: Unfortunately not! I had assumed it was that initially but when I refreshed and copied-and-pasted my post in it happened immediately. The CSRF token issue is what I usually get when it times out, the Error 99 one though is completely new to me. Let me try and post there again today, but I was having all sorts of oddities posting in the forums last week.
@rorie: So it turns out it's something to do with the content I am trying to post. I tried typing out my message and submitting it but received the 99 error. Same happened when I refreshed and copy pasted it back in. Finally I typed "Test" and it posted immediately.
I can't even share the message here with you, I will try PMing it to you.