hi, i have a similar problem since installing snow leopard... 10.6.1 (still running logic 8.0.2) actually most seems OK, but it screwed the environment... slightly, it does not output any audio anymore during a recording... i can record fine, but sending stuff through a bus is impossible and nothing arrives on the master track either... that means i can't monitor a recording...
once i have material recorded, or import audio, it seems all is like it should be, i mean i can work with it and it is been send to the master, etc...
strange... anyone have a similar experience or knows a fix?
cheers