Ok.. First off.. I'm not sure this is an issue for core duo iMac owners (early-mid 2006) since ive only experianced it with the newer core 2 duo. But to be on the safe side i think pretty much everyone with an intel imac can check their computers for this issue. Many of you core 2 duo imac owners has a faulty Airport without even knowing it. What happens is that the connection speed is "jumpy" it jumps from 11mbps to 28mbps to 36 to 54mbps then back to 11mbps all the time. It's not consistent. Many people don't know about this problem, since the most part don't even use the Airport instead of a cord connection. To be on the safe side, i recommend every one to meter their connectivity with the Air Traffic Control-Widget.. If you have a consistant router max- speed in the display (mostly common 54mbps), then youre on the safe side. If not, you, like many others, have a faulty airport. http://www.apple.com/downloads/dashboard/networking_security/airtrafficcontrol.html P.S. My apologies for bad spelling and gramatical errors. English ain't my mother tounge.