I've spent the last few minutes reading about network issues and the Intel macs running 10.4.8. This issue may be related but I'm not sure so I turn to here. I have a wireless network at a local college. We have a number of students connected to it to print, access a server and the internet. Sometimes, a few of the students get a IP in use error when trying to connect and must shut down and reboot in order to connect. Sometimes no error message appears at all and they just can't connect. Any ideas as to why certain laptops have issues? Any recommendations? It appears to be the same computers each time. I had one new Intel today where rebooting never solved the issue. I assume it may have to do with the same errors others have had. Has Apple offered any solution I might pass along to this student? Thanks for any help provided in advance.