Hello! My iMac has been connected wirelessly to my D-Link DI-604 802.11g router for near 4 months now. About 3 days ago, the iMac started to exhibit strange problems. Every 3-4 minutes, the connection drops. The airport icon at the top shows full bars (and the router is about 2 feet from the iMac) but the internet does not work anymore. Also, if I deconnect and try to reconnect, at first it gives me an error ("there was an error connecting to network XXX"), then my network disappears from the list for 1-2minutes and then I can connect. I think it has to do with an authentication problem but the password is correct etc. I don't know what may cause this. My PC with a wireless card is unaffected. It seems to be a software problem with my iMac. Does anyone have a solution?