Ok..after I updated to 10.4.9 everything seemed fine. I opened Mail and noticed that all my signatures and some headings have been replaced by some strange font. It seems like a system font issue but I don't know. I played with the font tab under preferences but none of the options control these particular fonts. Thanks. I have added a screen shot if my explanation doesn't take, should clarify my issue.
http://mindsinkmedia.com/ishot-4.jpg
http://mindsinkmedia.com/ishot-4.jpg