  We take a critical view of the treatment of threshold effects in SUSY
spectrum computations from high-scale input. We discuss the two principal
methods of (a) renormalization at a common SUSY scale versus (b) integrating
out sparticles at their own mass scales. We point out problems in the
implementations in public spectrum codes, together with suggestions for
improvements. In concrete examples, we compare results of Isajet7.72 and
Spheno2.2.3, and present the improvements done in Isajet7.73. We also comment
on theoretical uncertainties. Last but not least, we outline how a consistent
multiscale approach may be achieved.
