Quote from cclloyd
For the 1.7.2 version, do you mean it will break as in make unplayable, or just keep screwing up blocks built from this mod? AKA can I use it now and still expect my world to be playable?
Maybe. No guarantees the mod doesn't break your world completely due to some abstract bug that nobody has reported yet. It seems stableish right now, and all I can say is backup your world frequently.