*Update*
DNS caching is causing some troubles with the change over. A personal computer reboot may be needed to get the proxy to work properly. Otherwise, time is going to be needed for the old information to flush out of your caches.

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Previous Description (2012-09-18 15:47:38):

There will be a brief interruption in web proxy service on Thursday September 20, 2012 at 5:30am. The interruption will be brief, but may cause lost sessions. If this happens, logging back in will fix the problem.