Updated "Airport Utility", and now I can't access wireless network?

I just set up our office for wireless access, and my Macbook connected great. I got a notice to update the Airport utility, so I did. I logged out, stepped away for a bit, and then logged back in. Now my wireless network is connected to, but I can't access the internet at all.

Any ideas what's happening here?

EDIT: All I had to do was change the network settings to WPA, and now I can connect fine. I wonder if the Airport Utility update broke the WEP settings?