List, I have one document that after the 2018-11-18 update (beginning with 12-01 and continuing to the current 12-07) has generated hundreds of spurious missing character messages in the log. A short extract: fonts > start missing characters: C:/ConTeXt/tex/texmf/fonts/opentype/public/antt/AntykwaTorunskaCond-Regular.otf fonts > 72 U+00021 ! EXCLAMATION MARK fonts > 948 U+00022 " QUOTATION MARK fonts > 1302 U+00026 & AMPERSAND fonts > 345318 U+0002B + PLUS SIGN fonts > 216 U+00030 0 DIGIT ZERO fonts > 54270 U+00031 1 DIGIT ONE fonts > 28590 U+00036 6 DIGIT SIX fonts > 414 U+0003C < LESS-THAN SIGN fonts > 116712 U+00040 @ COMMERCIAL AT fonts > 1980 U+00042 B LATIN CAPITAL LETTER B fonts > 373878 U+00046 F LATIN CAPITAL LETTER F fonts > 48 U+00048 H LATIN CAPITAL LETTER H fonts > 3282 U+00049 I LATIN CAPITAL LETTER I fonts > 36 U+0004A J LATIN CAPITAL LETTER J fonts > 1560 U+0004B K LATIN CAPITAL LETTER K fonts > 12 U+0004C L LATIN CAPITAL LETTER L fonts > 3810 U+0004E N LATIN CAPITAL LETTER N fonts > 3402 U+00057 W LATIN CAPITAL LETTER W fonts > 48 U+0005A Z LATIN CAPITAL LETTER Z fonts > 64206 U+0005B [ LEFT SQUARE BRACKET fonts > 3420 U+00062 b LATIN SMALL LETTER B fonts > 3888 U+00063 c LATIN SMALL LETTER C fonts > 2880 U+00069 i LATIN SMALL LETTER I fonts > 1284 U+0006B k LATIN SMALL LETTER K fonts > 336 U+00070 p LATIN SMALL LETTER P fonts > 2118 U+0007B { LEFT CURLY BRACKET fonts > 258 U+0007C | VERTICAL LINE fonts > 12 U+0007E ~ TILDE fonts > stop missing characters There are similar reports for the other fonts used in the document (Antykwa Torunska is used for heads, EBGaramond with Libertinus fallback for the body). I have pared down the files to the following example which demonstrates the problem. I do not understand now all the features interact to cause this, but the reports disappear upon removing any (such as the seemingly-redundant \definebodyfontenvironment or the \switchtobodyfont[small]). \enabletrackers [fonts.missing] \definebodyfontenvironment [11pt] [a=1] \definefontfallback [fb:ebgr] [file:libertinusserif-regular] [0x204A] \starttypescript [serif] [ebgaramond] \definefontsynonym [Serif] [file:ebgaramond-regular] [fallbacks=fb:ebgr] \stoptypescript \define\Test{¡Missing!} \setupbodyfont [ebgaramond,11pt] \setupbodyfont [libertinus,11pt] \starttext \dorecurse{6}{ \switchtobodyfont[small] \Test\par} \stoptext While the messages appear to be incorrect, there is no apparent problem associated with them. I do not know if they point to some problem I have not recognized, or are truly spurious. (And I can eliminate them by turning off the tracker when I am sure that I have the needed coverage in the fallbacks.) Of course, if I am doing something wrong I would like to correct it. -- Rik