While not a major issue  . . . While neither issue discussed here is of major importance . . . —Pat Perriello  that depends on how important gluten-free bread is and for whom.  It seems to me that bread is bread, even when made of something like rice.  This invalid business is an over-reach.  The whole presentation of the Eucharist is “Give thanks to the Lord, for he is good” (Psalm 106:1a).  Liturgy of the Word, Reading 401, Monday of the Seventeenth Week in Ordinary Time I mentions “grave sin” three times (Exodus 32:15-34).  Insisting on gluten-free seems more like idolatry than letting the problem pass.  The parables, Matthew 13:31-35, are about interpreting what is said in the light of the flexible Faithful, not so much in the light of rigid rules.