I do not have THE answer but have suffered all these problems. Do you have "Use binary Morph Targets" enabled? This can confuse P6 if the obj is stored off Runtime or, is switched out often. On the mouse, if you can find the "lightball" and click it, arrow should reappear. The rest is pure guessing but, reistalling P6 and SR2 over your old locale helps. Updating your MBbios and Vid driver helps, too.