According to Team-Palle there has been no contact to Warren about this for a week now. So i think it's off the table.

New difficulties for Warren: IBF insists that Calzaghe face their mandatory challenger - Robert Stieglitz first. That fight maybe cannot be made in time for oct. 14th. (may have to go to purse-offer). So ultimately it COULD mean that the oct. 14th event is cancelled. Or Calzaghe may be forced to drop the IBF-title.

Source: http://icwales.icnetwork.co.uk/0700s...name_page.html