[NTG-context] Output from Context standalone (actual version) has wrong utf-8 encoding

Hi list rendering a very easy formula with greek text in it produces a pdf-document that has not a valid utf-8 string. I use evince for displaying pdfs under ubuntu linux. The document appears correctly on the screen but stops printing after a greek letter in a formula. The error-report says: Internal Error: cairo context error: input string not valid UTF-8 The same document compiled in live.contextgarden.net doesn't produce a mistake and can be printed with evince. I can still print the document correctly using 'lpr name.pdf', so it's not a big problem for me. But I don't know if that could be a problem for someone else. Test-Document: \starttext $3\omega$ \stoptext Tell me, what I can do to help. Thanks Christian