On AIX timestamp and horology regression fails in current, because
timestamp - interval for result timestamps that are before 1970 (epoch ?)
are off by one hour. I think this is not an issue for an adapted expected file,
but a new (in 7.1beta) bug. But I am at no means an expert at what the result
should be when substracting 34 years from epoch or 'Mon Dec 30 17:32:01 1996 PST'.
Andreas
