I have heard back from Peter. First the tweaky bug, it isn't a bug as such. It is all to do with the collision response, if you change the materials connected to an anchor the collision response of the Dillo will change when it hits the material at the anchor point, it's as simple as that but cannot be rectified.
We should soon have a new category opened just for beginners with forums for introductory topics and the beginners league. This will hopefully help to attract visiting newcomers as all the much needed info can be put in one easy to find place accesible directly from the board index and obvious at first glance.