Thanks for that Doug. I installed the Tuesday update and that helped with the menu problem.
However my biped script applied to a model is still having problems. If I create a new game in the 6.4 version the biped falls as expected but if the game was made in the 6.3 environment and updated to 6.4(templates al updated), no matter whether the script is removed, the outer world rebuilt or the biped model re-added, when going up steps or using a lift, he will not fall to ground but remains at the height he leaves the lift and can walk in mid air. It is really wierd.
Anyone have a solution?