To me the 6th May was always the likely date, but this regular drip-drip of 'gaffes' suggest we're now in the season of silly buggers.
As I predicted here, Brown will be furiously consulting his giant ACME book of Machiavellian plans, and there will follow a period of oh-so-clever will-he-won't-he speculation designed to out maneuver the Tories.
For a 25th March election, dissolution of Parliament would be 1st March, so I suspect in the week leading up to this, Brown will change tact and there will be further
In Brown's head this will be fabulously cunning stuff, but naturally it will backfire and we'll be reminded that we've been here before.
Of course it could just be that they are all genuine gaffes due Labour's incompetency.