Astonishing poll results in Australia: Labor PM Kevin Rudd behind in his own seat

Is this even possible?  It surely seems hard to believe.  My impression was that the national polls had tightened up and Rudd's seat is supposed to be a very safe seat for labor.  A discussion of the Guardian poll is available here.  An earlier poll from a couple weeks ago showed Rudd in the lead by about 10 percent.

UPDATE: Apparently bettors aren't taking the poll too seriously (see here).

Thanks to Peter Hartley and Damien S for this info.