If you can see the device then it should work. Therefore it should be 1.1 compatible.
How are you powering the Unicorn, and can you check you are getting 5V to it.
What version of HDDRUTIL ?
Fujiyama wrote:EDIT: it looks like I might have mixed up the wire colours. I'm doing a double-check now, but feel free to comment the above.
Fujiyama wrote:There was some talk about USB up-/downstream a while back, and incompatibilities with certain USB hubs. Not sure about the details, but this was straightened out with later versions of the Unicorn which had some additional circuitry to resolve this, wasn't it?