  This note corrects the mistakes in the splicing formulas of the paper "Floer
homology and splicing knot complements". The mistakes are the result of the
incorrect assumption that for a knot $K$ inside a homology sphere $Y$, the
involution on the knot Floer homology of $K$ which corresponds to moving the
basepoints by one full twist around $K$ is trivial. The correction implicitly
involves considering the contribution from this (possibly non-trivial)
involution in a number of places.
