A New York plaintiffs firm is attempting to knock the 1,000-pound gorilla known as Milberg Weiss Bershad Hynes & Lerach from atop an extremely lucrative Silicon Valley class action.

On Wednesday, Bernstein Litowitz Berger & Grossmann made a motion to disqualify Milberg Weiss from its spot as co-lead plaintiffs counsel in a massive securities class action against 3Com Corp.