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Leaving the <TT>no-math</TT> syntax out, using the <TT>babel</TT> package instead of <TT>polyglossia</TT> and changing the fonts finally helped. Now I’ve got a PDF file with integrated notes and the (virtual) box including the Lilypond notes even stops at the right margin – although I still get some error messages that there are some under- and overfull <TT>hbox</TT>es, but that has to to with my elder TEXLIVE packages I think.<BR>
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Anyway, I’d like to thank you all very much for your help!<BR>
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Best regards and have a nice day<BR>
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Raphael
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