In Orr v. Travelers Insurance Company, 95  Delaware County (PA) Reports 145 (2008), read opinion here, the Delaware County (PA) Court of Common Pleas discusses the high standard in Pennsylvania that must be met for overturning a binding arbitration decision. The court held that the failure of one of the arbitrators to disclose a prior affiliation with one of the parties was enough to trigger the "irregularity" threshold as a basis to set aside the award.