Are they all MacBooks? Any desktops you can try to set the NIC to 100FULL and disable auto negotiation?
Its wireless you jerk off
As far as I’ve seen they are all laptops. Most students dont have desktops. 10.4 and 10.5 are not affected. 10.6 seems to only have the problem. If the machine is dual booted the windows side works no problem…boot into Mac side and the problems start. All other Windows machines work no problem.
do you have the option to re-install the OS? It sounds to me like some config file is just fucked up somewhere, but that could be like finding a needle in a hay stack.