I can't see a way to edit my post, but need to add that when I submitted it to the VirusTotal site
Avast 4.8.1351.0 2010.06.02 found no threat -
and
Avast5 5.0.332.0 2010.06.02 found no threat -
so it is most strange that my free version of Avast 5.0.545 should see it as a threat?
Thank you.