You may remember that earlier this year, Yahoo! suffered a data breach which where about 450,000 users' passwords were stolen. Bloomberg.com reported that Yahoo! was slapped with a lawsuit claiming negligence that led to its data breach. Allan v. Yahoo! Inc. was filed on July 31 in U.S. District Court in Northern California. Jeff Allan, the lead plaintiff in the class-action suit, reportedly received a fraud alert when hackers attempted to break into his eBay account, which had the same sign-in credentials.