Shareholders have filed <A HREF="http://news.zdnet.com/2100-9595_22-6155898.html?tag=nl.r23660">an expanded securities-related lawsuit</A> against Dell, adding Intel as a defendant over the chipmaker's controversial marketing rebate program. The expanded complaint, filed earlier this week in U.S. District Court in Austin, Texas, alleges that the computer giant failed to make required disclosures to the Securities and Exchange Commission and investors about the "existence, impact and uncertainty of Intel rebates." The lawsuit also names additional Dell executives and Dell's auditor, PricewaterhouseCoopers, to the complaint.