We have noticed some different behaviour between V5 and V6 in how the selection highlight colour is used. In V5 while the selection window was open the edges were highlighted but the surfaces were not. You can see that here:
In V6, the entire object takes on the selection highlight colour while you make your choice:
Is this intentional? Some of our people feel that visibility was better with V5, but if this is how it is, then we will get used to it. Same can be said for selecting edges, and the whole surface highlights. This is probably the second most common question I’m being asked by our team (the first is “What happened to the Between Osnap?”) Anyway, here is a short video showing the surfaces being highlighted when I’m after the edge:
Maybe there is an option to not highlight the entire surface when selecting edges? If not, we will get used to it.