Invalid character in XML file

Hi,

I have been supplied xml data that will not validate because it
contains an invalid character.

I need to write a script to replace this character, but I am unable to
see what the character is.

I've tried several editors and also tried encoding the xml file with
all diiferent character sets, but still can't get it to display.

Textpad shows it as a thick pipe.

Frontpage will only load the document up to the character.

Stylusstudio shows it as a square box.

Anybody know a way to find out what this character is, or a way of
removing invalid characters from an xml document?

Thanks.

-- 
Carlos Narváez
http://www.aderezame.com