Updates:
Labels: Target-2.7
Comment #3 on issue 1001 by pekka.klarck: OperatingSystem library "run"
and "get environment variable" not working in Windows 7
http://code.google.com/p/robotframework/issues/detail?id=1001
Interesting. Only thing that I can think could explain this is that Jython
somehow fails to detect that it runs on Windows. This could be a result of
the standalone JAR being platform dependent or Jython somehow failing to
recognize newish Win7.
Could you try installing Jython 2.5.x on your machine and trying to run the
tests using it? I can test the standalone JAR on Win7 when I'm at office on
Monday and have a suitable machine available.