On Windows2000, when meshing for example a cube [0:1]x[0:1] in 2D with P2 element, some of the nodes which should be in the middle of the triangles corners ane badly placed. It can be already seen when meshing the border of the domain (1D mesh). Sometimes the nodes number 1 (at one corner) and the node number 4 (should be in the middle of node 1 and 2) have the sames coordinates.