Had an issue today with Myriad Pro Light typeface and using spanish characters with acute accent (á, í, ú etc.). When cufon transforms the text of an element that has CSS rule text-transform: capitalize applied, the lowercase accented characters become the same uppercase accented characters.
I just removed the given CSS rule and it worked fine for me but you might want to take a look at this 'cause this behavior was rather unexpected from cufon.
hey, i know its an old post, but i found whats going wrong with this.
search for /\b./g inside capitalize function. it have to be replaced with /(?:^|\s)./g