I tried to scroll the Web Inspector's HTML Hierarchy with the 3rd mouse button but it won't scroll (the third
mouse button being the middle one. I'm sorry for the poor description but I don't know how to say
"roulette" in English from French... Google tells me it's a "caster" but I have a doubt.).
All the others fields can be scrolled with it.
I'm working with a nightly build (WebKit 420+).
Confirmed, this is a bug and not an enhancement though. And it's called a scrollwheel :)
*** Bug 10663 has been marked as a duplicate of this bug. ***
This is fixed by my WebInspector branch.
This was fixed on the inspector branch and merged to trunk in r20986.