Dear Hans and All, in char-def.lua there are no "adobename" for "greekDelta" AKA "GREEK CAPITAL LETTER DELTA" "greekOmega" AKA "GREEK CAPITAL LETTER OMEGA" "greekmu" AKA "GREEK SMALL LETTER MU" because adobenames Delta, Omega and mu are used for "INCREMENT", "OHM SIGN", "textmu" AKA "MICRO SIGN". While the issue is of infinitesimal and only potential significance, may be it is worth a fix. The problem likely comes from Adobe Glyph List http://www.adobe.com/devnet/opentype/archives/glyphlist.txt The sub-optimal mapping was fixed in the latest version of Adobe Glyph List For New Fonts http://www.adobe.com/devnet/opentype/archives/aglfn.txt but not in the main Adobe Glyph List. Both lists are referenced from http://www.adobe.com/devnet/opentype/archives/glyph.html BTW, the Adobe Glyph List also has "increment", "Ohm" and "mu1" that look like better candidates for "INCREMENT", "OHM SIGN", "textmu" AKA "MICRO SIGN". Sincerely, Michail