Was just on another forum, having a debate about the current Zodiac.
From this I gathered that there are not a lot of people out there that know the true story behind it, and what they should actually be using when trying to do someones charts.

First facts:

There are 13 constellations/Zodiacs, missing is Ophuicus!
There was NO equal sign Zodiac before 550BC, (Talking about the "12" zodiacs)
Individual Horoscopes were not used until AFTER 400BC,
By the 1st Century BC, star related positions dropped out of use.
The Greeks, whom gave us the current Zodiac, did not have a Zodiac, this was given to them by the Babylonians, which the Greeks then adopted as their own, this was then "forgotten" about for sometime, and re-raised by the Middle age gurus.
Claudius Ptolemy 90AD - 168AD, spoke of Hipparchos 120BC - 120BC, whom had suggested that the Zodiac should begin at the Vernal Equinox, rather than 10 to 8 Deg away from it, which WAS what the true Babylonian Atronomers had indicated. But Vernal Equinox theory was rejected at first, then 300 years later Ptolemy was re read by the Middle Age Astrologers and it made it part of the Astrological Orthodoxy.
What this then did was tie the Zodiac to the Roman Calander, and because of this its now COMPLETLY our of touch with the stars, as the dates of the Zodiac are fixed to the Calander.
Ophiucus is an "Original" sun sign.

The traditional Zodiac:
Pisces Feb 19 - Mar 20
Aries Mar 21 - Apr 19
Taurus Apr 20 - May 20
Gemini May 21 - Jun 20
Cancer Jun 21 - Jul 22
Leo Jul 23 - Aug 22
Virgo Aug 23 - Sept 22
Libra Sep 23 - Oct 22
Scorpio Oct 23 - Nov 21
Sag Nov 22 - Dec 21
Cap Dec 22 - Jan 19
Aquarius Jan 20 - Feb 18

Now compare

Galactical Zodiac:

Pisces Mar 12 - Apr 18
Aries Apr 19 - May 13
Taurus May 14 - Jun 19
Gemini Jun 20 - July 20
Cancer Jul 21 - Aug 9
Leo Aug 10 - Sep 15
Virgo Sept 16 - Oct 30
Libra Oct 31 - Nov 22
Scorpio Nov 23 - Nov 29
Ophuicus Nov 30 - Dec 17
Sag Dec 18 - Jan 18
Cap Jan 19 - Feb 15
Aquarius Feb 15 - Mar 11

This is refered to as the Blunder:

Book Zodiacs Old and New:

Cyril Fagan:
1896 - 1970

Cyril is refering to the tying of the Zodiac to the Calander:

" This was the greatest blunder that has ever been made in the history of Astrology"

Now with this in mind, do you think current Zodiac readings would be reliable...

Well according to this its not. It is out of touch with the real concept of Star Signs.

So next time your sitting reading your horoscope, take it with a grain of salt!