[Spambayes] Mixed case words in heading

[Jan Fure]

Hi;

I have noticed that many spam messages contain words with mixed case. I 
am wondering whether spambayes has any provision for increasing the spam 
rating when that occurs, even if that particular mixed case word has not 
been encountered before?

Also, are there any provisions for creating a whitelist, or is that 
typically not necessary, as the filter algorithm is effective enough?

Jan