Thanks for the help guys.
Pragma, I'm waiting on the IT office of my university to get back to me. Thought I'd give a challenge to Tilted Computers in the meantime.
Mephisto, my MTU was already set at 1300. I'm able to customize it... would setting it to anything higher be worth a shot? And about getting a new client: I think that's be best solution, but there might be a problem. Poking around in the settings, I noticed that there's information in the Group Access Information part, including a password (shown as asterisks, and I have no idea what it is). I assume that this info came with the particular install of the client that my university provides. And I would guess I'd have to uninstall this client, then install the new one, correct? I guess that means I'd lose that info then.... You wouldn't happen to have link to an upgrade for v3.6 would ya?
Boner, you could be right. I'm using a cable modem service from a different university (i'm in the middle of an student exchange program), and they're pretty stingy about bandwidth, so I wouldn't be surprised if what you say is the case...
diergray, I do use Outpost Firewall, but I haven't noticed a difference when I disable it. I've gone as far as setting the firewall to not start up at boot up, then rebooting, to make sure it was completely gone. Could merely having a software firewall installed cause issues? And no, I don't have a physical router/firewall between my computer on the cable modem.
Arg, it's such a pain that this problem makes my internet connection kaput. I'd be messing around with it a lot more if I didn't have to reboot to get back online for more ideas.