Starter.race crashes on collision with constructor interiors

I've exported a simple dif file consisting of only one box an put it in an unchanged starter.race demo. When the vehicle collides with the interior, the game crashes. I've tried structural brush, collision brush and vehicle collision brush but none of them seems to work. This problem doesn't exist in the starter.fps demo, it works smoothly. I am using a brand new clean 1.5.1 tge installation and a brand new constructor 1.0 installation. I would appreciate any feedback on this...