Computed spatial profile for the spectral order 10 with a wide dekker setting. This wide dekker exaggerates the intra-order contamination. There were no modulators in the beam. Charge shuffling of 27 pixels was done with polarization calibration unit polarizer in place. Beams a and b represent one set of orthogonally polarized spectra. Beams c and d represent another set of orthogonally polarized spectra. The asymmetry in intra-order contamination is easily seen where intense d and b beams strongly influence c but not a. In double-differenced polarization calculations, this leads to spurious continuum polarization effects.