Calculation of the structure and vibrational spectrum of the fluoroformyloxyl radical, FC(O)O, using ab initio methods is complicated by orbital symmetry breaking in the Hartree-Fock wave function. While symmetry breaking is most directly corrected with multiconfiguration Hartree-Fock methods, the problem can also be attacked with single reference methods when combined with an electron correlation treatment that adequately mixes the Hartree-Fock determinants leading to the symmetry breaking. In this work the structure and vibrational spectrum of both the ground (X B-2(2)) and second excited (B (2)A(1)) states of the FC(O)O radical are calculated using single-reference wave functions constructed in two different ways-unrestricted (UHF) and quasirestricted (QRHF) Hartree-Fock wave functions-in combination with a coupled cluster [CCSD and CCSD(T)] electron correlation treatment. We find that both methods must be employed with some caution, but in combination they provide reliable prediction of the vibrational spectrum of the FC(O)O radical.