MUSIC-type, non-iterative imaging of a collection of dielectric and/or magnetic inclusions in the 3-D electromagnetic case is considered. It is based on the singular value decomposition of its Multi-Static Response matrix (MSR), emphasis being on the adverse situation in which a fixed electric dipole array is operated in the transmit/receive mode at a single frequency. The study is illustrated in the present paper from synthetic data independently computed by the coupled dipole method (P. Chaumet et al., Physical Rev. E, vol. 70, 03606, 2004).