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We discuss kinematical enhancements of cutoff effects at short andintermediate distances. Starting from a pedagogical example with periodicboundary conditions, we switch to the case of the Schroedinger Functional,where the theoretical analysis is checked by precise numerical data with Nf=2dynamical O(a)-improved Wilson quarks. Finally we present an improveddetermination of the renormalization of the axial current in that theory.

On cutoff effects in lattice QCD from short to long distances