The IRS has a proposed new regulation which would prohibit charter-school teachers from participating in state retirement plans. (At present, all of the states which authorize charter schools permit, and in some cases require, the charter-school teachers to participate in these plans.) Furthermore, the new regulation would apparently apply retroactively and would cause the teachers to lose the state contributions to their accounts which have been accrued, and on which they were no doubt relying, unless they give up their employment. More here.
Today, February 6, is the last day for public comments on this issue under IRS procedures.