I have a 6 month old Macbook Pro which works fine with WiFi everywhere that I've tried it besides on my college campus. The WiFi worked fine in the Spring on campus, but they changed to a new system where you have to login to access the WiFi (where it redirects you to a login screen that is a webpage). What is strange about this is that I am able to connect immediately without ever seeing the login screen, but the WiFi drops every 1-2 minutes. The only way to get the Wifi back is to renew the DHCP lease. I am able to use the Wifi at places like Starbucks or Barnes & Noble where they have the same type of login screen (except I actually get the login screen there). The "IT people" have no idea, and I've tried things like deleting the network and rejoining, but haven't had any luck. Any ideas?
I noticed this error shows up everytime in the Console when the connection drops (no idea what it means though):
com.apple.launchd (com.apple.netauth.sysagent) Exited with exit code: 255