As for the psalm verses in the Lectionary, they are taken from the NAB 1970 translation (which in turn is base on the Confraternity version. In fact, the text of all the OT readings in the Lectionary are taken from this translation, with some modifications here and there. See this link for more information.) This accounts for the version Xopheros mentions, "I rejoice because they said to me . . . " which is from the NAB 1970 translation.
Further, the responses (antiphons, refrains) to the psalms are translated from the Latin, which is the reason they do not always correspond to the same verse if it appears in the psalm verses. The translation of some of these antiphons was changed or modified for the 1998 Lectionary.
To participate in the discussions on Catholic church music, sign in or register as a forum member, The forum is a project of the Church Music Association of America.