This week I have been seeing 'Oops, you don't have permission to post here' appearing a lot after I click submit - usually when replying to a post. I compose my reply, press submit, get the Oops message, hit back, my reply has gone and if I were a newbie I would probably be gone with it rather than starting again. OK, so I compose long messages in my own text editor and paste here, but the shorter ones I don't. When I reload the page and try again, it is always OK.
Only been happening this week, last couple of days in fact.