webkit transition not seeming to work in some box-shadow rules

[Aimar]

I want an expandable tree in a table cell. I got that to work. While playing around with it, I tried to add a transitioned box shadow. That works only at the root level. (JsFiddle). The problem may have something to do with transitions not working on display (link). But does a display change foul up all transitions, or am I missing something? (I only put in a webkit transition.)Thanks.