Well, unless personalities are subtly altered, on a ~248 year cycle (or whatever Pluto's orbital period is) then all their ideas about planetary influence are cøck-eyed.
They already fudge the small matter of the precession of earth's orbit. The "First Point of Aries" (q.v.) has shifted such that, if your supposed star sign is Scorpio and you look where the sun was on the day of your birth, you will find it in Libra.
The full precession cycle is 26,000 years. A 1/12 inaccuracy suggests to me that Astrology has been broken for at least half of the last 2000 years.
Other modifications to Astrology were required in
1781 - Uranus
1846 - Neptune
Of course, in "the good, old days" astrologers would get executed, for failure to predict things - the appearance of a comet being a classic harbinger of doom for them.
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