The computer is set to use the long date format and everything is OK until I
make changes to a chart which causes all dates in all open worksheets to be
displayed in the short date format.  When excel is closed down and restarted
the problem is resolved - but doing this is annoying.

I can't see if this a known fault or if it has been introduced through a
patch.

Does anyone know anything about this strange behaviour please?

Thanks.

Bill Ridgeway