activateKey setting focus then scrolling to top dependant on key

[mheptinstall]

I am finding that activateKey is not setting focus correctly depending on the key/node used. It is first setting focus but then scrolling back up to the top of the tree with the active/selected node not in view.

The fiddle below works as expected:
http://jsfiddle.net/op5ga0zf/2/

This fiddle scrolls back up to the top of the tree, the only difference is the key value being used in activateKey:
http://jsfiddle.net/op5ga0zf/3/

I get the same behaviour in all browsers, am I doing something wrong or is this a bug?

[mar10]

This could be a bug. Maybe depending on the different nesting of the target node.
(Btw. I had to add jQuery to the includes to make the fiddle work.)