PS: I first made the above comment with another nickname. It didn't get published. (No error message whatsoever.)

I posted the exact same comment again (copy pasted from notepad) and got the message:
"Duplicate comment detected; it looks as though you’ve already said that!"

So wordpress received the original comment but "disappeared" it. I don't see how this could be anything else but a wordpress issue.

From then on the only way to avoid the 'duplicate comment' from being triggered is to post with a different nickname.

@ezpzvi: If Mitt Romney would have been a democrat they would have posted this as well.

I don't think this is about left vs right or republican vs democrat, this is about making fun of stupidity.

Of course one could argue that only republicans have idiots like Mitt Romney in their ranks, but that's your problem. And I didn't say that.

You are a defective human being.

Just give us money and we will fix that.

THAT is the message and why people put up with it is beyond me.

PPS: I've encountered this on every wordpress blog I have commented on (and there have been several).

Comment does not show up, no error, no message, no moderation, no nothing. Reposting the same comment gives: "you've already said that". AAAARRRRCH.

Only fix is to comment again with a different nick.

Here we go again. No, strictly speaking it's not ethical. So what? You live a perfectly ethical life?
There is a lot worse to worry about in today's world than a mouse.

(PS: when is wordpress gonna fix that black hole into which comments sometimes disappear for no reason whatsoever?)