OSX Lion - Hidpi Mode

As I’m partially sighted, the new hidpi mode in Lion is extremely useful for me (I’m scaling so that everything is twice as big). Has anyone tried this in Cubase and got it working without window problems? It works if I plug my macbook into an external display then drag window into that and back again, but without doing this, the cursor is off when clicking on things.

I’ve got a 17" Macbook Pro. Just wondered if anyone has any experiences with experimenting with this.