New York man who claims ownership in Facebook is now seeking 50 percent of the site's value from founder Mark Zuckerberg.

Paul Ceglia of Allegany County originally sought 84 percent in a federal court complaint against Zuckerberg last year. He cited a contract he says he signed with the former Harvard student in 2003 that gave him half the business, plus more if it launched late.

A revised complaint dated Monday amends the claim to 50 percent and indicates that Ceglia agreed to waive the late-penalty clause just before the site launched in 2004.

The suit in federal court in Buffalo says Ceglia gave Zuckerberg $1,000 to help Zuckerberg get his fledgling Facebook idea off the ground.