Floyd et al,
Been getting a the following error today. Get it all the time on Mozilla/Linux. Sometimes on Konquerer.
The proxy server received an invalid response from an upstream server.
Apache/2.0.45 (Unix) Server at www.theserverside.com Port 80
Thanks Jason, a problem with our apache configuration came up on one of our boxes. Unfortunately, our load balancer was sending a lot of our traffic to this box (since it was responding the fastest).
We've taken the server down until we can diagnose the problem.