I have a Docbook XML document that has some images with special characters in their names (German umlauts). I'm using Saxon 6.5.5 and the Docbook xslt Stylesheets to create HTMLHelp files based on that document. Unfortunately the filenames are then url-encoded (% and hexadecimal code), which internet explorer can't deal with (with firefox it works). I looked for a parameter which could change this feature, but couldn't find any. I also tried to save my image files using the encoded names, but this didn't work either. Does anyone know a good way around this, or will I have to simply forbid special characters in my image names?