Wallflower,
Have you read the canonization formula?
"In honor of the Blessed Trinity, for the exaltation of the Catholic Faith and the growth of Christian life, with the authority of Our Lord Jesus Christ, of the Blessed Apostles Peter and Paul and Our Own, after lengthy reflection, having assiduously invoked God's assistance and taken into account the opinion of many brothers of ours in the episcopate, we declare and define [name] to be a saint [or "to be blessed"], and we enroll him in the Catalogue of the saints, and we establish that in the whole Church he should be devoutly honored among the saints. In the name ofthe Father and of the son and of the Holy Spirit. Amen."
Please explain how that is NOT an exercise of papal infallibility.