http://forums.openqa.org/thread.jspa?threadID=10189 describes the problem. Connecting to port 82 doesn't work.

The logs don't show much, (which is a problem in its own right!) so I stepped through in a debugger. On line 768 of revision 1973, we check to see if the port is allowed against a short list of about 8 ports (80, 4444, 8000, 8080, 8888, 443, 8443). If the port is less than 1024 and isn't on that list, we forbid proxying to that port.

That policy may make sense for a generally usable end-user proxy, but it makes no sense for us. We should just ignore that test.