I just bought a 17 core 2 duo iMac last Saturday. I've had it working for a week but I've been havnig problems maintaining a wireless connection. I bought a 20" core 2 duo iMac on Sunday and its the next room over, but it's wireless connection is consistent. When the airport on the iMac 17" gets signal, its full strength... when I slightly move the iMac it completely drops connection. How would anyone solve this problem? Or...has anyone had a problem with their 17" imac trying to get signal? Any help would be appreciated. Thanks! BTW, i use a wireless G Linksys router.... the standard signal strength is 20, but I've installed 3rd party firmware that enabled me to get it to 251. Signal is stronger than normal, but my iMac Core 2 in that room is still having trouble. Its connection is randomly being dropped. Should i bring the machine back to the applestore and have them replace the machine?