As the government’s demands for waiver of privilege in white-collar prosecutions have sparked the ire of attorneys worried about the sanctity of client communications, the waiver issue in the Milberg Weiss Bershad & Schulman case is presenting an especially prickly problem.

The recent announcement that a grand jury had indicted the securities class action giant and two of its partners was a triumph for prosecutors in the ongoing investigation. The government alleges that the firm paid clients more than $11 million in kickbacks to serve as plaintiffs in as many as 150 class action and derivative lawsuits.