The recent determination of the charged πNN coupling constant,
gπ±​, by the Uppsala Neutron Research Group implies that there may be
considerable charge-splitting of the pion coupling constant. We investigate the
consequences of this for the charge-independence breaking (CIB) of the 1S0​
scattering length, ΔaCIB​. We find that ΔaCIB​ depends
sensitively on the difference between gπ±​ and the neutral πNN
coupling constant, gπ0​. Moreover, if gπ±2​ is only about 3%
larger than gπ02​, then the established theoretical explanation of
ΔaCIB​ (in terms of pion mass splitting) is completely wiped out.Comment: 9 pages, fbs styles, 1 figure; dedicated to Walter Gl\"ockle on the
occasion of his 60th birthda