Hello. I have just upgraded my wireless router from 802.11g (Netgear) to 802.11n (Belkin). No problem with my iMac or Macbook both running the latest Leopard until I sleep the iMac. When it wakes it cannot see the router until I reconfigure the network settings. My Macbook, on the other hand, is fine. Where do I start looking please? Regards, John johnmasters at me.com