PHILADELPHIA - A Pennsylvania federal judge erred when he found that opt-out class actions based on state employment laws were incompatible with the opt-in procedure provided by federal law, the Third Circuit U.S. Court of Appeals ruled March 27 (Daniel Knepper v. Rite Aid Corporation, et al., No. 11-1684, James Fisher, et al. v. Rite Aid Corporation, et al., No. 11-1685, 3rd Cir.; 2012 U.S. App. LEXIS 6216).