OK, for everyone who's currently overusing the phrase "methinks she doth protest too much" in relation to Helen Clark at the moment:
The quote is "The lady doth protest too much, methinks." (Hamlet, Act III, scene 2 or thereabouts)
And in the context of Hamlet, it doesn't really mean what people use it to mean these days anyway.
On a related subject, is there anyone in Parliament who doesn't look like a prick at the moment? It's only a matter of days before the backbenchers actually start flinging faeces at each other across the debating chamber, I don't doubt.