Having installed Snow Leopard and also the 10.6.1 update, I now have intermittent wireless network access which can be both malfunctioning Safari and Mail or either. This is cured normally by either turning off Airport and then turning it back on or by re-starting my iMac. I also have both Airport turn off when I have printed a document using either the Canon IP6700 driver or the HP Laserjet 1200 driver, both of which were downloaded from the Apple website automatically following installation of Snow Leopard. The problem is driving me nuts. I also found that my previously installed Canon LIDE 200 scanner would not work until I downloaded and reinstalled the Canon Scanjet driver. Anyone else experiencing these or similar problems and has found a workaround ?