I have the OohBetty spikey hair and have had no problems. Dirk is right, the Poser updater from Curious will stop the error message. When using the hair, simply select the figure's head and then apply the hair object. It should pretty much go right in place on the head. Then use the dials to move it slightly if need be and be sure to parent it to the head with the object>change parent menu option.