Sorry for making it sound like a bug, I didn't mean to put it that way. Having kasra below shadda/tashdid is fine by me in most cases. But there are some times when I have to put kasra below the letter (e.g., when typesetting parts of arabic text containing quranic verses). I'm aware it is up to a font designers, who mostly follow only "kasra below shadda" way. And this is one case when I have to use one of those fonts (KFGQPC Uthman Taha Naskh font: http://fonts.qurancomplex.gov.sa/). I was hoping someone knows of a workaround or a hack which I can use with XeLaTeX to overcome this. Vafa provided a valuable code (thank you!) which works fine for some fonts, but, unfortunately, not for this one :( If anyone has any suggestions, please, let me know. Thanks.
test.tex
Description: TeX document
test.pdf
Description: Adobe PDF document
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