Thanks for clarification.
I am afraid this is the case. I do not know xml but I have some experience with html so I can partially understand it. I have found the CIV4SpecialistInfos.xml file and I have found an entry:
Code:
<Type>SPECIALIST_NOBLE</Type>
<Description>TXT_KEY_SPECIALIST_NOBLE</Description>
[...]
<GreatPeopleUnitClass>UNITCLASS_ARTIST</GreatPeopleUnitClass>
<iGreatPeopleRateChange>3</iGreatPeopleRateChange>
I guess GreatPeopleUnitClass should be NONE or so (I will manually change that and check the game).
S.
Edit: yes, it works. After I have changed it to NONE (not UNITCLASS_NONE) the odds for GA started to slowly decrease: a few turns and they have dropped from 49% to 43%. So accumulated points remain but the new ones seem to be calculated correctly.