Hello: We have two Macs. PowerBook G4 and MacBook. Both I think are 2005 models. Both have Airport Extreme wireless cards (though slightly different models). We have a D-Link DI-624 AirPlus Xtreme G wireless router. The two mac notebooks get dropped from the networks for extended periods. My PC laptops do not have this issue. Overall the macs seem to have a slower connection. Does anyone have any suggestions? Thank you.