After an ongoing debate and trials, the Supreme Court threw out a class-discrimination suit against Walmart due to too many differences across stores and staffs in the case. I am sure that this decision was a huge relief for Walmart, which saw shares go up over 1 percent during the day.
source: http://www.reuters.com/article/2011/06/20/us-walmart-lawsuit-idUSTRE75J3P120110620
source: http://www.reuters.com/article/2011/06/20/us-walmart-lawsuit-idUSTRE75J3P120110620