Unapproved visitor message?

[Rhyfelwyr]

I can't get rid of a notification at the top of my page, which tells me I have an 'Unapproved visitor message'. A new message is there from a certain Kurdish friend, but what he says seems to suggest his post was in some way edited/blocked by a moderator.

Not quite sure what is going on here, but the notification won't disappear.