  We reconsider the fine-tuning problem of scalar-driven inflation arising from
the need to couple the inflaton to ordinary matter in order to make reheating
efficient. Quantum fluctuations of this matter induce Coleman-Weinberg
corrections to the inflaton potential, depending (for de Sitter background) in
a complex way on the ratio of the inflaton to the Hubble parameter. These
corrections are not Planck-suppressed and cannot be completely subtracted
because they are not even local for a general geometry. A previous study showed
that it is not satisfactory to subtract a local function of just the inflaton
and the {\it initial} Hubble parameter. This paper examines the other allowed
possibility of subtracting a local function of the inflaton and the Ricci
scalar. The problem in this case is that the new, scalar degree of freedom
induced by the subtraction causes inflation to end almost instantly.
