The websites I read to steal...er, borrow... items for my blog were all a-twitter about the Pope washing the feet of girls and Muslims on Thursday. Fr. Z explains two points:
1 ) "The foot washing rite is actually optional, though that fact is little grasped by liberals who impose the options they like as obligatory on those who would prefer to opt out. Liturgical law prescribes that only men (viri in Latin) can be chosen for that rite. Priests who want to adhere to the law will find themselves facing fierce opposition by liberals demanding that women be included. Bishops will be hard-pressed to explain how priests should keep to the liturgical law when the Pope himself flouts it. By including women, the Pope has cast all liturgical laws into the hazard."
2) "After Summorum Pontificum went into force, a clarifying document called Universae Ecclesiae was issued to help people interpret correctly how how to implement Pope Benedict’s provisions. Universae Ecclesiae says that all customs or liturgical practices not in force in 1962 (such as altars girls, communion in the hand and now, apparently, washing women’s feet), are not to be integrated into liturgies in the older form of the Roman Rite. Priests and lay Catholics who want Holy Thursday without dilemmas and controversies and fights about whose feet can be washed, have the legitimate option of the traditional Roman Missal which is, effectively, bullet proof."