diff --git a/runtime/syntax/tex.vim b/runtime/syntax/tex.vim
index ec0f7b9..5544fb6 100644
--- a/runtime/syntax/tex.vim
+++ b/runtime/syntax/tex.vim
@@ -1,8 +1,8 @@
 " Vim syntax file
 " Language:	TeX
 " Maintainer:	Charles E. Campbell <NcampObell@SdrPchip.AorgM-NOSPAM>
-" Last Change:	Jun 29, 2020
-" Version:	119
+" Last Change:	Apr 22, 2022
+" Version:	121
 " URL:		http://www.drchip.org/astronaut/vim/index.html#SYNTAX_TEX
 "
 " Notes: {{{1
@@ -173,13 +173,25 @@
  syn cluster texItalGroup add=texMatcher
 endif
 if !s:tex_nospell
- syn cluster texMatchGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMatcher,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texBoldStyle,texBoldItalStyle,texItalStyle,texItalBoldStyle,texZone,texInputFile,texOption,@Spell
- syn cluster texMatchNMGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMatcherNM,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texBoldStyle,texBoldItalStyle,texItalStyle,texItalBoldStyle,texZone,texInputFile,texOption,@Spell
- syn cluster texStyleGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texBoldStyle,texBoldItalStyle,texItalStyle,texItalBoldStyle,texZone,texInputFile,texOption,texStyleStatement,texStyleMatcher,@Spell
+ if !s:tex_no_error
+  syn cluster texMatchGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texError,texInput,texLength,texLigature,texMatcher,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texBoldStyle,texBoldItalStyle,texItalStyle,texItalBoldStyle,texZone,texInputFile,texOption,@Spell
+  syn cluster texMatchNMGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texError,texInput,texLength,texLigature,texMatcherNM,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texBoldStyle,texBoldItalStyle,texItalStyle,texItalBoldStyle,texZone,texInputFile,texOption,@Spell
+  syn cluster texStyleGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texError,texInput,texLength,texLigature,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texBoldStyle,texBoldItalStyle,texItalStyle,texItalBoldStyle,texZone,texInputFile,texOption,texStyleStatement,texStyleMatcher,@Spell
+ else
+  syn cluster texMatchGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMatcher,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texBoldStyle,texBoldItalStyle,texItalStyle,texItalBoldStyle,texZone,texInputFile,texOption,@Spell
+  syn cluster texMatchNMGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMatcherNM,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texBoldStyle,texBoldItalStyle,texItalStyle,texItalBoldStyle,texZone,texInputFile,texOption,@Spell
+  syn cluster texStyleGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texBoldStyle,texBoldItalStyle,texItalStyle,texItalBoldStyle,texZone,texInputFile,texOption,texStyleStatement,texStyleMatcher,@Spell
+ endif
 else
- syn cluster texMatchGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMatcher,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone,texInputFile,texOption
- syn cluster texMatchNMGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMatcherNM,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone,texInputFile,texOption
- syn cluster texStyleGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone,texInputFile,texOption,texStyleStatement,texStyleMatcher
+ if !s:tex_no_error
+  syn cluster texMatchGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texError,texInput,texLength,texLigature,texMatcher,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone,texInputFile,texOption
+  syn cluster texMatchNMGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texError,texInput,texLength,texLigature,texMatcherNM,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone,texInputFile,texOption
+  syn cluster texStyleGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texError,texInput,texLength,texLigature,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone,texInputFile,texOption,texStyleStatement,texStyleMatcher
+ else
+  syn cluster texMatchGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMatcher,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone,texInputFile,texOption
+  syn cluster texMatchNMGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMatcherNM,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone,texInputFile,texOption
+  syn cluster texStyleGroup		contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone,texInputFile,texOption,texStyleStatement,texStyleMatcher
+ endif
 endif
 syn cluster texPreambleMatchGroup	contains=texAccent,texBadMath,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMatcherNM,texNewCmd,texNewEnv,texOnlyMath,texParen,texRefZone,texSection,texSpecialChar,texStatement,texString,texTitle,texTypeSize,texTypeStyle,texZone,texInputFile,texOption,texMathZoneZ
 syn cluster texRefGroup			contains=texMatcher,texComment,texDelimiter
@@ -189,7 +201,7 @@
  syn cluster texMatchGroup		add=@texMathZones
  syn cluster texMathDelimGroup		contains=texMathDelimBad,texMathDelimKey,texMathDelimSet1,texMathDelimSet2
  syn cluster texMathMatchGroup		contains=@texMathZones,texComment,texDefCmd,texDelimiter,texDocType,texInput,texLength,texLigature,texMathDelim,texMathMatcher,texMathOper,texNewCmd,texNewEnv,texRefZone,texSection,texSpecialChar,texStatement,texString,texTypeSize,texTypeStyle,texZone
- syn cluster texMathZoneGroup		contains=texComment,texDelimiter,texLength,texMathDelim,texMathMatcher,texMathOper,texMathSymbol,texMathText,texRefZone,texSpecialChar,texStatement,texTypeSize,texTypeStyle
+ syn cluster texMathZoneGroup		contains=texBadPar,texComment,texDelimiter,texLength,texMathDelim,texMathMatcher,texMathOper,texMathSymbol,texMathText,texRefZone,texSpecialChar,texStatement,texTypeSize,texTypeStyle
  if !s:tex_no_error
   syn cluster texMathMatchGroup		add=texMathError
   syn cluster texMathZoneGroup		add=texMathError
@@ -214,21 +226,21 @@
 if s:tex_fast =~# 'm'
   if !s:tex_no_error
    if s:tex_matchcheck =~ '{'
-    syn region texMatcher	matchgroup=Delimiter start="{" skip="\\\\\|\\[{}]"	end="}"			transparent contains=@texMatchGroup,texError
-    syn region texMatcherNM	matchgroup=Delimiter start="{" skip="\\\\\|\\[{}]"	end="}"			transparent contains=@texMatchNMGroup,texError
+    syn region texMatcher	matchgroup=texDelimiter start="{" skip="\\\\\|\\[{}]"	end="}"			transparent contains=@texMatchGroup,texError
+    syn region texMatcherNM	matchgroup=texDelimiter start="{" skip="\\\\\|\\[{}]"	end="}"			transparent contains=@texMatchNMGroup,texError
    endif
    if s:tex_matchcheck =~ '\['
-    syn region texMatcher	matchgroup=Delimiter start="\["				end="]"			transparent contains=@texMatchGroup,texError,@NoSpell
-    syn region texMatcherNM	matchgroup=Delimiter start="\["				end="]"			transparent contains=@texMatchNMGroup,texError,@NoSpell
+    syn region texMatcher	matchgroup=texDelimiter start="\["				end="]"			transparent contains=@texMatchGroup,texError,@NoSpell
+    syn region texMatcherNM	matchgroup=texDelimiter start="\["				end="]"			transparent contains=@texMatchNMGroup,texError,@NoSpell
    endif
   else
    if s:tex_matchcheck =~ '{'
-    syn region texMatcher	matchgroup=Delimiter start="{" skip="\\\\\|\\[{}]"	end="}"			transparent contains=@texMatchGroup
-    syn region texMatcherNM	matchgroup=Delimiter start="{" skip="\\\\\|\\[{}]"	end="}"			transparent contains=@texMatchNMGroup
+    syn region texMatcher	matchgroup=texDelimiter start="{" skip="\\\\\|\\[{}]"	end="}"			transparent contains=@texMatchGroup
+    syn region texMatcherNM	matchgroup=texDelimiter start="{" skip="\\\\\|\\[{}]"	end="}"			transparent contains=@texMatchNMGroup
    endif
    if s:tex_matchcheck =~ '\['
-    syn region texMatcher	matchgroup=Delimiter start="\["				end="]"			transparent contains=@texMatchGroup
-    syn region texMatcherNM	matchgroup=Delimiter start="\["				end="]"			transparent contains=@texMatchNMGroup
+    syn region texMatcher	matchgroup=texDelimiter start="\["				end="]"			transparent contains=@texMatchGroup
+    syn region texMatcherNM	matchgroup=texDelimiter start="\["				end="]"			transparent contains=@texMatchNMGroup
    endif
   endif
   if s:tex_matchcheck =~ '('
@@ -251,7 +263,7 @@
    if !s:tex_no_error
     syn match  texMathError	"}"	contained
    endif
-   syn region texMathMatcher	matchgroup=Delimiter	start="{"          skip="\%(\\\\\)*\\}"     end="}" end="%stopzone\>"	contained contains=@texMathMatchGroup
+   syn region texMathMatcher	matchgroup=texDelimiter	start="{"          skip="\%(\\\\\)*\\}"     end="}" end="%stopzone\>"	contained contains=@texMathMatchGroup
   endif
 endif
 
@@ -291,14 +303,14 @@
 " \begin{}/\end{} section markers: {{{1
 syn match  texBeginEnd		"\\begin\>\|\\end\>" nextgroup=texBeginEndName
 if s:tex_fast =~# 'm'
-  syn region texBeginEndName		matchgroup=Delimiter	start="{"		end="}"	contained	nextgroup=texBeginEndModifier	contains=texComment
-  syn region texBeginEndModifier	matchgroup=Delimiter	start="\["		end="]"	contained	contains=texComment,@texMathZones,@NoSpell
+  syn region texBeginEndName		matchgroup=texDelimiter	start="{"		end="}"	contained	nextgroup=texBeginEndModifier	contains=texComment
+  syn region texBeginEndModifier	matchgroup=texDelimiter	start="\["		end="]"	contained	contains=texComment,@texMathZones,@NoSpell
 endif
 
 " \documentclass, \documentstyle, \usepackage: {{{1
 syn match  texDocType		"\\documentclass\>\|\\documentstyle\>\|\\usepackage\>"	nextgroup=texBeginEndName,texDocTypeArgs
 if s:tex_fast =~# 'm'
-  syn region texDocTypeArgs	matchgroup=Delimiter start="\[" end="]"			contained	nextgroup=texBeginEndName	contains=texComment,@NoSpell
+  syn region texDocTypeArgs	matchgroup=texDelimiter start="\[" end="]"			contained	nextgroup=texBeginEndName	contains=texComment,@NoSpell
 endif
 
 " Preamble syntax-based folding support: {{{1
@@ -312,7 +324,7 @@
 syn match texInputFile		"\\\(epsfig\|input\|usepackage\)\s*\(\[.*\]\)\={.\{-}}"		contains=texStatement,texInputCurlies,texInputFileOpt
 syn match texInputCurlies	"[{}]"								contained
 if s:tex_fast =~# 'm'
- syn region texInputFileOpt	matchgroup=Delimiter start="\[" end="\]"			contained	contains=texComment
+ syn region texInputFileOpt	matchgroup=texDelimiter start="\[" end="\]"			contained	contains=texComment
 endif
 
 " Type Styles (LaTeX 2.09): {{{1
@@ -334,10 +346,8 @@
 syn match texTypeStyle		"\\textmd\>"
 syn match texTypeStyle		"\\textrm\>"
 
-syn match texTypeStyle		"\\mathbb\>"
 syn match texTypeStyle		"\\mathbf\>"
 syn match texTypeStyle		"\\mathcal\>"
-syn match texTypeStyle		"\\mathfrak\>"
 syn match texTypeStyle		"\\mathit\>"
 syn match texTypeStyle		"\\mathnormal\>"
 syn match texTypeStyle		"\\mathrm\>"
@@ -430,6 +440,7 @@
  syn match texBadMath		"\\end\s*{\s*\(array\|[bBpvV]matrix\|split\|smallmatrix\)\s*}"
  syn match texBadMath		"\\end\s*{\s*\(displaymath\|equation\|eqnarray\|math\)\*\=\s*}"
  syn match texBadMath		"\\[\])]"
+ syn match texBadPar	contained  "\%(\\par\>\|^\s*\n.\)"
 endif
 
 " Math Zones: {{{1
@@ -475,15 +486,15 @@
  " Inline Math Zones: {{{2
  if s:tex_fast =~# 'M'
   if has("conceal") && &enc == 'utf-8' && s:tex_conceal =~# 'd'
-   syn region texMathZoneV	matchgroup=Delimiter start="\\("			matchgroup=Delimiter	end="\\)\|%stopzone\>"			keepend concealends contains=@texMathZoneGroup
-   syn region texMathZoneW	matchgroup=Delimiter start="\\\["			matchgroup=Delimiter	end="\\]\|%stopzone\>"			keepend concealends contains=@texMathZoneGroup
-   syn region texMathZoneX	matchgroup=Delimiter start="\$" skip="\\\\\|\\\$"	matchgroup=Delimiter	end="\$"	end="%stopzone\>"		concealends contains=@texMathZoneGroup
-   syn region texMathZoneY	matchgroup=Delimiter start="\$\$" 			matchgroup=Delimiter	end="\$\$"	end="%stopzone\>"	keepend concealends contains=@texMathZoneGroup
+   syn region texMathZoneV	matchgroup=texDelimiter start="\\("			matchgroup=texDelimiter	end="\\)\|%stopzone\>"			keepend concealends contains=@texMathZoneGroup
+   syn region texMathZoneW	matchgroup=texDelimiter start="\\\["			matchgroup=texDelimiter	end="\\]\|%stopzone\>"			keepend concealends contains=@texMathZoneGroup
+   syn region texMathZoneX	matchgroup=texDelimiter start="\$" skip="\\\\\|\\\$"	matchgroup=texDelimiter	end="\$"	end="%stopzone\>"		concealends contains=@texMathZoneGroup
+   syn region texMathZoneY	matchgroup=texDelimiter start="\$\$" 			matchgroup=texDelimiter	end="\$\$"	end="%stopzone\>"	keepend concealends contains=@texMathZoneGroup
   else
-   syn region texMathZoneV	matchgroup=Delimiter start="\\("			matchgroup=Delimiter	end="\\)\|%stopzone\>"			keepend contains=@texMathZoneGroup
-   syn region texMathZoneW	matchgroup=Delimiter start="\\\["			matchgroup=Delimiter	end="\\]\|%stopzone\>"			keepend contains=@texMathZoneGroup
-   syn region texMathZoneX	matchgroup=Delimiter start="\$" skip="\%(\\\\\)*\\\$"	matchgroup=Delimiter	end="\$"	end="%stopzone\>"		contains=@texMathZoneGroup
-   syn region texMathZoneY	matchgroup=Delimiter start="\$\$" 			matchgroup=Delimiter	end="\$\$"	end="%stopzone\>"	keepend	contains=@texMathZoneGroup
+   syn region texMathZoneV	matchgroup=texDelimiter start="\\("			matchgroup=texDelimiter	end="\\)\|%stopzone\>"			keepend contains=@texMathZoneGroup
+   syn region texMathZoneW	matchgroup=texDelimiter start="\\\["			matchgroup=texDelimiter	end="\\]\|%stopzone\>"			keepend contains=@texMathZoneGroup
+   syn region texMathZoneX	matchgroup=texDelimiter start="\$" skip="\%(\\\\\)*\\\$"	matchgroup=texDelimiter	end="\$"	end="%stopzone\>"		contains=@texMathZoneGroup
+   syn region texMathZoneY	matchgroup=texDelimiter start="\$\$" 			matchgroup=texDelimiter	end="\$\$"	end="%stopzone\>"	keepend	contains=@texMathZoneGroup
   endif
   syn region texMathZoneZ	matchgroup=texStatement start="\\ensuremath\s*{"	matchgroup=texStatement	end="}"		end="%stopzone\>"	contains=@texMathZoneGroup
  endif
@@ -650,23 +661,23 @@
   syn region texRefZone		matchgroup=texStatement start="\\label{"		end="}\|%stopzone\>"	contains=@texRefGroup
   syn region texRefZone		matchgroup=texStatement start="\\\(page\|eq\)ref{"	end="}\|%stopzone\>"	contains=@texRefGroup
   syn region texRefZone		matchgroup=texStatement start="\\v\=ref{"		end="}\|%stopzone\>"	contains=@texRefGroup
-  syn region texRefOption	contained	matchgroup=Delimiter start='\[' end=']'		contains=@texRefGroup,texRefZone	nextgroup=texRefOption,texCite
-  syn region texCite		contained	matchgroup=Delimiter start='{' end='}'		contains=@texRefGroup,texRefZone,texCite
+  syn region texRefOption	contained	matchgroup=texDelimiter start='\[' end=']'		contains=@texRefGroup,texRefZone	nextgroup=texRefOption,texCite
+  syn region texCite		contained	matchgroup=texDelimiter start='{' end='}'		contains=@texRefGroup,texRefZone,texCite
 endif
 syn match  texRefZone		'\\cite\%([tp]\*\=\)\=\>' nextgroup=texRefOption,texCite
 
-" Handle newcommand, newenvironment : {{{1
-syn match  texNewCmd				"\\newcommand\>"			nextgroup=texCmdName skipwhite skipnl
+" Handle (re)newcommand, (re)newenvironment : {{{1
+syn match  texNewCmd				"\\\%(re\)\=newcommand\>"		nextgroup=texCmdName skipwhite skipnl
 if s:tex_fast =~# 'V'
-  syn region texCmdName contained matchgroup=Delimiter start="{"rs=s+1  end="}"		nextgroup=texCmdArgs,texCmdBody skipwhite skipnl
-  syn region texCmdArgs contained matchgroup=Delimiter start="\["rs=s+1 end="]"		nextgroup=texCmdBody skipwhite skipnl
-  syn region texCmdBody contained matchgroup=Delimiter start="{"rs=s+1 skip="\\\\\|\\[{}]"	matchgroup=Delimiter end="}" contains=@texCmdGroup
+  syn region texCmdName contained matchgroup=texDelimiter start="{"rs=s+1  end="}"		nextgroup=texCmdArgs,texCmdBody skipwhite skipnl
+  syn region texCmdArgs contained matchgroup=texDelimiter start="\["rs=s+1 end="]"		nextgroup=texCmdBody skipwhite skipnl
+  syn region texCmdBody contained matchgroup=texDelimiter start="{"rs=s+1 skip="\\\\\|\\[{}]"	matchgroup=texDelimiter end="}" contains=@texCmdGroup
 endif
-syn match  texNewEnv				"\\newenvironment\>"			nextgroup=texEnvName skipwhite skipnl
+syn match  texNewEnv				"\\\%(re\)\=newenvironment\>"		nextgroup=texEnvName skipwhite skipnl
 if s:tex_fast =~# 'V'
-  syn region texEnvName contained matchgroup=Delimiter start="{"rs=s+1  end="}"		nextgroup=texEnvBgn skipwhite skipnl
-  syn region texEnvBgn  contained matchgroup=Delimiter start="{"rs=s+1  end="}"		nextgroup=texEnvEnd skipwhite skipnl contains=@texEnvGroup
-  syn region texEnvEnd  contained matchgroup=Delimiter start="{"rs=s+1  end="}"		skipwhite skipnl contains=@texEnvGroup
+  syn region texEnvName contained matchgroup=texDelimiter start="{"rs=s+1  end="}"		nextgroup=texEnvBgn skipwhite skipnl
+  syn region texEnvBgn  contained matchgroup=texDelimiter start="{"rs=s+1  end="}"		nextgroup=texEnvEnd skipwhite skipnl contains=@texEnvGroup
+  syn region texEnvEnd  contained matchgroup=texDelimiter start="{"rs=s+1  end="}"		skipwhite skipnl contains=@texEnvGroup
 endif
 
 " Definitions/Commands: {{{1
@@ -694,8 +705,8 @@
  endif
  syn match  texStyleStatement		"\\[a-zA-Z@]\+"	contained
  if s:tex_fast =~# 'S'
-  syn region texStyleMatcher		matchgroup=Delimiter start="{" skip="\\\\\|\\[{}]"	end="}"		contains=@texStyleGroup,texError	contained
-  syn region texStyleMatcher		matchgroup=Delimiter start="\["				end="]"		contains=@texStyleGroup,texError	contained
+  syn region texStyleMatcher		matchgroup=texDelimiter start="{" skip="\\\\\|\\[{}]"	end="}"		contains=@texStyleGroup,texError	contained
+  syn region texStyleMatcher		matchgroup=texDelimiter start="\["				end="]"		contains=@texStyleGroup,texError	contained
  endif
 endif
 
@@ -1017,8 +1028,8 @@
  " Superscripts/Subscripts {{{2
  if s:tex_conceal =~# 's'
   if s:tex_fast =~# 's'
-   syn region texSuperscript	matchgroup=Delimiter start='\^{'	skip="\\\\\|\\[{}]" end='}'	contained concealends contains=texSpecialChar,texSuperscripts,texStatement,texSubscript,texSuperscript,texMathMatcher
-   syn region texSubscript	matchgroup=Delimiter start='_{'		skip="\\\\\|\\[{}]" end='}'	contained concealends contains=texSpecialChar,texSubscripts,texStatement,texSubscript,texSuperscript,texMathMatcher
+   syn region texSuperscript	matchgroup=texDelimiter start='\^{'	skip="\\\\\|\\[{}]" end='}'	contained concealends contains=texSpecialChar,texSuperscripts,texStatement,texSubscript,texSuperscript,texMathMatcher
+   syn region texSubscript	matchgroup=texDelimiter start='_{'		skip="\\\\\|\\[{}]" end='}'	contained concealends contains=texSpecialChar,texSubscripts,texStatement,texSubscript,texSuperscript,texMathMatcher
   endif
   " s:SuperSub:
   fun! s:SuperSub(group,leader,pat,cchar)
@@ -1255,6 +1266,7 @@
   if !exists("g:tex_no_error")
    if !exists("g:tex_no_math")
     hi def link texBadMath		texError
+    hi def link texBadPar		texBadMath
     hi def link texMathDelimBad		texError
     hi def link texMathError		texError
     if !b:tex_stylish