Pledgate08: Why Did Goff Stuff Up?

There is an interesting post on Hooton's blog. Why would Phil Goff be the one Labour MP to stuff up and have his Information Kit for the Over '60s so closely associated with the Labour Party when all others have avoided making this mistake? Is it because Goff is stupid? Not the Phil Goff we know. Or is it because someone did not tell him the rules?? Could he have been set up? Who would do such a thing to Labour's heir apparent?