User-Agent changing

[Sarah Reichelt]

I was working on communications with a RevOnRockets-based web server,
and I was checking the headers of the web request to see whether the
request was coming from a Revolution program, or a browser. I had
checked earlier and the headers included the line:
  User-Agent: Revolution (MacOS)

In the middle of a debugging session, this suddenly changed to:
  User-Agent: Metacard (MacOS)

How can this be?

A restart of Rev fixed it, but it is a bit unnerving to think that
this can change suddenly. I am doing nothing with http headers except
reading them.

Sarah