and it worked? wow. you'd figure the recovery would block downgrades. what version did you downgrade from?
i'm tempted to consider updating and then trying to root the latest cube rom using some newer 'universal' root methods, but i didn't want to end up stuck. if you can downgrade, that gives some hope that I wouldn't. (although no one has the install zip for the factory version, which is the only version that cuberoot works on, right?)