property&sensor+bullet physics

I used on my game that “property” stuff - when on collision an object with property"whatever" touches sensor it adds, in my case, overlay scene.
Well it doesn`t happen. When i use Sumo Physics engine it works without problems. Im using Bullet engine in my game… and Blender 2.41 (im Mac user).

added image:

Please Help! :confused:

I think the broken collision sensor using bullet physics is a known bug that will be fixed [at least mostly] in 2.42

Thanks… oh well, waiting for 2.42