This may be slightly OT, since I think it's a font problem rather than a XeTeX problem, but I'm hoping someone here may be able to give me a few pointers. If not, please forgive the noise.
I recently switched from using Gentium (http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=gentium) to Gentium Plus to typeset some classical Greek text, and I'm now getting different results when I use combining diacriticals in the XeTeX input. I've attached a very small XeTeX example that demonstrates the problem, along with the output I get. (The .tex file is in UTF-8.) The first line in the document body, as indicated, uses a precomposed Unicode character; the second line uses equivalent combining diacriticals. At least, I thought they were supposed to be equivalent; as you can see from the PDF, the output is different. In the PDF, the "precomposed" line is the desired output -- the diacriticals are supposed to be stacked, not superimposed. This same input file works fine (stacked rather than superimposed diacriticals) if I switch back to Gentium, which suggests that the difference is in the fonts, rather than in XeTeX. It's much more convenient for me to use the combining diacriticals, for various reasons that aren't all that interesting here. Is there something in XeTeX/fontspec I can do to make that input work again, or is this a font problem? MacOS 10.8.3, TeXLive 2012. Thanks much, Richard
greek.tex
Description: TeX document
greek.pdf
Description: Adobe PDF document
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