Quadtree space issue

Hi, I'm experiencing a problem with QuadTree spaces which doesn't 
present itself with either Hash or Simple spaces. The only plausible 
explanation I've been able to find so far would be if the QuadTree space 
were ignoring calls to dSetSpaceCleanup on it, and destroying its 
contained geoms regardless.  Has anybody else experience anything like this?

Thanks in advance,
Mark