At first sight the Aharonov-Bohm effect appears nonlocal, though not i
n the way EPR/ Bell correlations are generally acknowledged to be nonl
ocal. This paper applies an analysis of nonlocality to the Aharonov-Bo
hm effect to show that its peculiarities may be blamed either on a fai
lure of a principle of local action or on a failure of a principle of
separability. Different interpretations of quantum mechanics disagree
on how blame should be allocated. The parallel between the Aharonov-Bo
hm effect and violations of Bell inequalities turns out to be so close
that a balanced assessment of the nature and significance of quantum
nonlocality requires a detailed study of both effects.