[pdftex] special characters in \pdfinfo

[Holger Daszler]

Hello,
maybe that's a beginner's question.

I have to use german special characters, like ae, oe, ue or
sz (/ss, "s). This works perfect with pdftex in the document body.

If I use these special characters in \pdfinfo (like in /Author or
/Title) the ae, ue, oe appears correctly in Acrobat-Reader's File ->
Document Properties -> General.

But not the sz (/ss).

Whats the reason and how to change it?

Thanks for help,
Holger