Looks like the problem is not limited to ConTeXT (thank goodness, in a way!) and Graphite still doesn't work on XeLaTeX. The only difference is that XeLaTeX is able to handle OT without resorting to the XeTeX \font primitive.
I still don't understand why /GR should cause a segmentation fault. I don't think my Graphite font has a problem because it works fine on LibreOffice 3.5. I don't know how to test pure XeTeX without LaTeX or ConTeXT. For a minimal file: \font\myfontbrah = "Adinatha Tamil Brahmi" \myfontbrah π ππΈ ππΊ ππ» ππΌ ππ½ πππ° ππ ππ πππ° ππ ππ ππ° ... to be passed through XeTeX, TeXWorks throws me an error saying it "can't find the format file `xetex.fmt'"... -- Shriramana Sharma
test-xelatex.pdf
Description: Adobe PDF document
test-xelatex.tex
Description: TeX document
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