Hi,

> There is an actual '?' in the html source, so It would appear 
> that the 
> XSLT has transformed some other character from the XML to 
> make question 
> marks.

Check the XML source, is there the QUESTION MARK character there, too? Might be that the XML document is being read in using a wrong character encoding; XSLT engines are pretty solid these days, usually it's the IO in and out that corrupts characters.

Cheers,

Jarno - Apoptygma Berzerk: Kathy's Song (Ferry Corsten  Remix)