I don't know any details of the case, but this type of thing is never good.
U.S. District Court Judge Martin Jenkins in San Francisco certified the class of about 1.6 million women who worked for Wal-Mart's U.S. stores at any time since December 26, 1998, attorneys for the six lead plaintiffs said.
The lawsuit, filed in 2001, accuses the largest U.S. private-sector employer of discriminating against women employees and retaliating against those who complained.
Like I've said before. WalMart is on it's way down. Logistical efficiency and buying power will get you a long way, but good employees will get you even further. Whether the accusations are true or not, WalMart hasn't done a good job of building employee loyalty.