  We have measured the superconducting transition temperature T_c of F/S/F
trilayers using Permalloy (Py=Ni_84 Fe_16) as a strongly polarized
ferromagnetic material. For a parallel (P) or anti-parallel (AP) alignment of
the magnetization directions of the outer ferromagnets, we observe a T_c
difference as large as 20 mK, with a stronger suppression of superconductivity
in the P state than in the AP state. This behavior is opposite to the recent
observations of Rusanov et al., Phys. Rev. B 73, 060505 (2006) in Py/Nb/Py
trilayers, but is consistent with earlier results on trilayers with Ni or CuNi
alloy as the ferromagnetic material.
