Astrology has always seemed inherently absurd to me; the failure of of astrological predictions in double-blind tests comes as no surprise.
But people are more impressed by anecdotal data, so I have often had to listen to proponents gush about how uncannily they think everyone's personalities correspond to their sun signs. They even tell me, after (of course) discovering I am a Libra, that I behave exactly like a Libra.
Well, now all of the confirmations have become falsifications. I'm not even a Libra: turns out I'm a Virgo.
My guess: we'll be treated to a torrent of denialism and blatantly ad hoc rationales.
More detail from Neurologica.