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Dear, I am sorry to bring up \overline, \overbar, and \bar issue. Here is a sample file and I attached two pdf files which were compiled using two different version of ConTeXt. Under the LuaTeX v. 1.03, ConTeXt ver: 2017.03.02 22:23 MKIV beta, the output overlineB.pdf is OK, but under the LuaTeX v. 1.04, ConTeXt ver: 2017.05.14 19:09 MKIV beta, the output overlineA.pdf is strange. Would you please check what is the problem? Thank you. Best regards, Dalyoung %%%%%%%%%%%%%% \starttext \startitemize[n] \item Which is true? \startitemize[n, packed, columns, two][stopper=,left=(, right=)] \item $\overline{A} = A \cup A^\circ$ \item $\overline{A\cup B} = \overline{A} \cup \overline{B}$ \item If $A \subset B$ then $\overline{B} \subset \overline{A}$ \item $A\cup A'$ is an open set. \stopitemize \item Which is true? \startitemize[n, packed, columns, two][stopper=,left=(, right=)] \item $\overbar{A} = A \cup A^\circ$ \item If $A \subset B$ then $\overbar{B} \subset \overbar{A}$ \item $\overbar{A\cup B} = \overbar{A} \cup \overbar{B}$ \item $A\cup A'$ is an open set. \stopitemize \item Which is true? \startitemize[n, packed, columns, two][stopper=,left=(, right=)] \item $\bar{ACC} = A \cup A^\circ$ \item If $A \subset B$ then $\bar{BCDE} \subset \bar{A}$ \item $\bar{ACC\cup B} = \bar{A} \cup \bar{BCC}$ \item $A\cup A'$ is an open set. \stopitemize \stopitemize \stoptext log files: %%%%%% -- OverlineA.pdf mtx-context | run 1: luatex --fmt="/Users/graph/ConTeXt/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luatex/cont-en" --jobname="0verline" --lua="/Users/graph/ConTeXt/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luatex/cont-en.lui" --no-parse-first-line --c:currentrun=1 --c:fulljobname="./0verline.tex" --c:input="./0verline.tex" --c:kindofrun=1 --c:maxnofruns=9 "cont-yes.mkiv" This is LuaTeX, Version 1.0.4 (TeX Live 2017) system commands enabled. open source > level 1, order 1, name '/Users/graph/ConTeXt/tex/texmf-context/tex/context/base/mkiv/cont-yes.mkiv' system > system > ConTeXt ver: 2017.05.14 19:09 MKIV beta fmt: 2017.5.16 int: english/english system > %%%%%% -- OverlineB.pdf mtx-context | run 1: luatex --fmt="/Users/graph/ConTeXt/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luatex/cont-en" --jobname="0verline" --lua="/Users/graph/ConTeXt/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luatex/cont-en.lui" --no-parse-first-line --c:currentrun=1 --c:fulljobname="./0verline.tex" --c:input="./0verline.tex" --c:kindofrun=1 --c:maxnofruns=9 --c:purgeall "cont-yes.mkiv" This is LuaTeX, Version 1.0.3 (TeX Live 2017/dev) system commands enabled. open source > level 1, order 1, name '/Users/graph/ConTeXt/tex/texmf-context/tex/context/base/mkiv/cont-yes.mkiv' system > system > ConTeXt ver: 2017.03.02 22:23 MKIV beta fmt: 2017.3.11 int: english/english