A judge preliminarily okays a $590 million Citigroup securities class action settlement, and, a law firm will pay $25 million to settle Nadel Ponzi charges. Hear these and other stories from LexisNexis® Mealey's™ Publications. Copyright© 2012 LexisNexis, a division of Reed Elsevier Inc. For the latest litigation news headlines, visit www.lexisnexis.com/mealeys or www.lexisnexis.com/community.