Any update or info available as yet? I've read all the docs etc as mentioned by Greg and don't have a clue whether this is a bug or if I'm doing something wrong (using 3.5.2).
I've tried adding toolbar blocks to the right toolbar in the adminlevel demo and that is working fine so somebody at ez has the solution.
Please help, it's a <i>basic</i> feature that simply does not works as described.