Different BAYES scores

[Chris Conn]

Hello,

I have just gotten around to upgrading my 2.64 SA servers to 3.0.3.  I 
have read the FAQ and searched the archives, so if the following 
question has been asked or covered, please push me in the right 
direction and I will be on my way....

Is there any documentation as to why the BAYES_XX scores have been 
changed, and for what reason?  Previously BAYES_00 was -4.9 and BAYES_99 
was 5.4, and they are now -2.5 and 3.5 respectively.  Just curious as to 
why.

Thanks,

Chris