  We test the assumption that fermion-loop corrections to high energy $W^+W^-$
scattering are negligible when compared to the boson-loop ones. Indeed, we find
that, if the couplings of the interactions deviate from their Standard Model
values, fermion-loop corrections can in fact become as important or even
greater than boson-loop corrections for some particular regions of the
parameter space, and both types of loops should be taken into account. Some
preliminary results are shown.
