We have measured cross sections for (d,2He)-induced reactions on 26Mg at an energy of Ed=125.2 MeV. The measured Gamow-Teller strength is significantly smaller than that inferred from (p,n) reactions. We demonstrate that + Gamow-Teller strengths for T0+1 states deduced from (p,n) reactions may have significant systematic uncertainties due to ambiguities in the large backgrounds that must be subtracted.