I've got Spark updated to the latest software/firmware. I'm able to load it in a blank Cubase session, but it freezes with the spinning beach ball of doom when trying to add it to an existing project.
Also, on the new blank session it appears to be using the 64 bit bridge. Is Spark a 32 bit only VST plugin? If so I'm incredibly disappointed. I can't imagine any new plugins/VSTi's these days not coming out of the gate as 64 bit. (Waves is still doing that, but I refuse to update WUP or buy anything new from them until they update to 64 bit). I would have never purchased Spark it had I known that it's not 64 bit compatible. This should have been clear on your product specs page.
I really hope Spark gets updated to 64 bit soon as the bridging in Cubase is really buggy and sub par.
I think Spark has great potential, but 32 bit only is a major pain for Cubase OSX users.