there is logical reason not to change hwclock
i just tried to copy a tar across the globe, from a windows machine to a unix server, and got this error message.
the clocks are just fine on both ends.
maybe i could create the tar using GMT time, i don't know.
but the solution was to skip date matching, and not to change clocks.
not working -
tar xzvf fname.tar.gz
working (extra "m") -
tar xmzvf fname.tar.gz