(In reply to comment #27)
> The main problem with original throbber was that it was a Core code, and this
> is where it doesn't belong. Bringing that implementation back is not what
> anyone wants. See comment #2.
The assumption in comment #2 (and bug 481359) was that an app can (reliably) set the cursor override on the window, which is not currently possible - at least not without changing core interfaces - if I understand comment #7 and #8 correctly.
> Bringing that implementation back is not what anyone wants.
I don't think that is true, but that's a matter of opinion.