Sorry to have cause confusion here. I was pointed at 1024093 from elsewhere. When it seemed a good match
but was still broken I added my 2 cents wroth. I didn't spot it was a virtual environment.
Thanks to James for doing the admin of cloning the bug.It's now just over 5 weeks from my original comment and the behaviour is unchanged.
I'll repeat my offer to run some tests, if somebody could suggest a good set.
-- Graeme