In re-thinking (and looking it up in EOB ) I agree:
3. Crediting rules for forfeitures. Forfeitures are annual additions for a limitation year if they are allocated as of any date in that year. See Treas. Reg. §1.415©-1(b)(6)(i)(D).
3.a. Example. For the limitation year ending September 30, 2010, there are forfeitures totaling $18,000 under a profit sharing plan. To the extent those forfeitures are allocated for the year ending September 30, 2010, they are treated as annual additions for that year, even if the actual determination of that allocation occurs after the close of the plan year. For example, if the plan administrator does not actually perform the allocation until May 10, 2011, the forfeitures allocated as of the September 30, 2010, allocation date are still treated as annual additions for the limitation year ending September 30, 2010, even if May 10, 2011, would be later than the section 415 crediting deadline described above that applies to employer contributions.