I've got an iMac, an original G5 dual proc, a new G5 dual core and an old single proc G4. My original G5 has an intermitent problem. All my Macs are hooked up to a router and then to a cable modem. Every now and then, for no reason, the G5 disconnects from the internet after being put to sleep. Each time I wake it I have to reset the router and then all is okay until I put it to sleep again. Then, also for no apparent reason, it stops doing that! The original G5 is the only one that has this problem. Any ideas? Thanks.