Problem solved :-). I don't know if it can have sense or help anyone anywhere, nor if in fact it is linked to another bad setting from I...
Origin of the problem : physics ! I set it to basicphysics as explained in the wiki. But with it, no way to get the avatar not stucked in the corner. So I tried to set it to rexopendynamicsengine, as per default in the wizard, and the problem is solved. -- http://groups.google.com/group/realxtend http://www.realxtend.org