I don’t know if this is new or not, but MSDN has some crazy crumbtrail action going on. See the image — mousing over any step in the crumbtrail will pop open a window listing all the
siblings children of that step. If there’s a lot, the little pop-up scrolls.
This has the effect of allowing you to retrace your steps in the crumbtrail and make different decisions directly from that interface, without having to go back and reload a page further up the tree.
I can’t decide is this is good or bad. Opinions?