> One really simple way to make it shorter is to say "00:00", leaving > out the seconds.
That’s a good solution. It removes the long-standing ambiguity without looking too ugly. Best regards David Harper Wellcome Sanger Institute, Cambridge, England -- The Wellcome Sanger Institute is operated by Genome Research Limited, a charity registered in England with number 1021457 and a company registered in England with number 2742969, whose registered office is 215 Euston Road, London, NW1 2BE.