Hi, thanks for your answers. I was already using fat hulls, but this shouldn't make a difference as the problem occurs only when two entities are moving towards each other - collision is fine with map entities. I tried setting my.scale_x, but that didn't do anything. I also just tried reducing the speed at which the characters are moving, but the same thing happens...

In fact, exactly the same thing happens in the Office level too. If you go into 3rd person mode and get the old wizard dead in front of the guard and press forwards, sometimes he'll pass right through him (although this happens a lot less frequently in the Office level than in my level). I've put a small picture of this happening on the webpage I linked to below.

From what I've read in another thread ( http://www.conitec.net/ubbcgi/ultimatebb.cgi?ubb=get_topic&f=6&t=000320 ), I think the problem lies in the fact that both entities are performing a move instruction at the same time - any suggestions on how I can work around this?

Thanks again,
Keith