I have a Canon MP830 all-in-one unit. When connected to a Windows 2000 PC or when connected to a MacOS X 10.4 machine, it worked fine. Under 10.5 Leopard and now 10.6 Snow Leopard, there is a long delay between pages when printing even simple text documents. The delay can be anywhere from 20 seconds to more than a minute. Scanning works just fine, the problem is only with printing. Unit is connected via USB, and I've tried it in different ports just in case of a bad port. I have tried both Canon's own printer drivers and the Apple drivers from 10.6 Snow Leopard. I have a 2006 Mac Pro 4x2.66 GHz with 5GB of RAM. It's the same machine which ran 10.4 Tiger without this issue, and I'm currently on 10.6.2.