There hasn't been any response to this? If this problem is unresolvable, can anyone explain why Akoustik Piano is the only NI plugin that is affected by this problem? I also own Elektrik Piano and Absynth and neither of those products are affected. What is the difference? Maybe the developers from Akoustik Piano should talk to the folks from some of the other NI products to try and figure out what they are doing differently. At the very least, NI should stop claiming that Akoustik Piano supports Audio Units as an interface until they decide that it is worth their time to bother making their product compatible. This affects the most recent versions of both Garageband on both Leopard and Tiger, and yes I have tried all of these combinations.