  We address three questions raised by Cummings and Foreman regarding a model
of Gitik and Sharon. We first analyze the PCF-theoretic structure of the
Gitik-Sharon model, determining the extent of good and bad scales. We then
classify the bad points of the bad scales existing in both the Gitik-Sharon
model and other models containing bad scales. Finally, we investigate the ideal
of subsets of singular cardinals of countable cofinality carrying good scales.
