diff --git a/VERSION b/VERSION
index bda8fbe..00750ed 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.6
+3
diff --git a/configure.sh b/configure.sh
index da9fa14..5b91399 100755
--- a/configure.sh
+++ b/configure.sh
@@ -45,12 +45,11 @@ locals() {
     --CXX-BINDING)
 		echo CXX_BINDING=T
 		;;
-    --GITHUB-CHECKBOX)
-		echo GITHUB_CHECKBOX=T
+    --GITHUB-CHECKBOX|--GITHUB-CHECKBOX=ENTITY)
+		echo GITHUB_CHECKBOX_STYLE=entity
 		;;
     --GITHUB-CHECKBOX=INPUT)
-		echo GITHUB_CHECKBOX=T
-		echo GITHUB_CHECKBOX_AS_INPUT=T
+		echo GITHUB_CHECKBOX_STYLE=input
 		;;
     esac
 }
@@ -79,8 +78,9 @@ done
 # theme wants the old behavior of --with-(foo)
 #
 case "`echo "$WITH_DL" | $AC_UPPERCASE`" in
-    EXTRA)         THEME_CF="MKD_DLEXTRA|MKD_NODLDISCOUNT";;
-    BOTH)          THEME_CF="MKD_DLEXTRA";;
+    DISCOUNT)      THEME_CF="MKD_DLDISCOUNT";;
+    EXTRA)         THEME_CF="MKD_DLEXTRA";;
+    BOTH)          THEME_CF="MKD_DLIST";;
 esac
 test "$WITH_FENCED_CODE" && THEME_CF="${THEME_CF:+$THEME_CF|}MKD_FENCEDCODE"
 
@@ -232,9 +232,10 @@ else
     AC_SUB 'H1TITLE' ''
 fi
 
-if [ "$GITHUB_CHECKBOX" ]; then
-    AC_DEFINE 'GITHUB_CHECKBOX' '1'
-    test "$GITHUB_CHECKBOX_AS_INPUT" && AC_DEFINE 'CHECKBOX_AS_INPUT' '1'
+if [ "$GITHUB_CHECKBOX_STYLE" = "entity" ]; then
+    AC_DEFINE 'CHECKBOX_AS_INPUT' '0'
+else
+    AC_DEFINE 'CHECKBOX_AS_INPUT' '1'
 fi
 
 
diff --git a/dumptree.c b/dumptree.c
index e3fbaf3..2fca134 100644
--- a/dumptree.c
+++ b/dumptree.c
@@ -115,10 +115,8 @@ dumptree(Paragraph *pp, Stack *sp, FILE *f)
 	if ( pp->ident )
 	    d += fprintf(f, " %s", pp->ident);
 
-#ifdef GITHUB_CHECKBOX
 	if ( pp->flags )
 	    d += fprintf(f, " %x", pp->flags);
-#endif
 	    
 	if ( pp->align > 1 )
 	    d += fprintf(f, ", <%s>", Begin[pp->align]);
diff --git a/flags.c b/flags.c
index 78ff3dc..2742d53 100644
--- a/flags.c
+++ b/flags.c
@@ -11,7 +11,6 @@ static struct flagnames flagnames[] = {
     { MKD_NOIMAGE,        "!IMAGE" },
     { MKD_NOPANTS,        "!PANTS" },
     { MKD_NOHTML,         "!HTML" },
-    { MKD_STRICT,         "STRICT" },
     { MKD_TAGTEXT,        "TAGTEXT" },
     { MKD_NO_EXT,         "!EXT" },
     { MKD_CDATA,          "CDATA" },
@@ -27,14 +26,14 @@ static struct flagnames flagnames[] = {
     { MKD_TABSTOP,        "TABSTOP" },
     { MKD_NODIVQUOTE,     "!DIVQUOTE" },
     { MKD_NOALPHALIST,    "!ALPHALIST" },
-    { MKD_NODLIST,        "!DLIST" },
     { MKD_EXTRA_FOOTNOTE, "FOOTNOTE" },
     { MKD_NOSTYLE,        "!STYLE" },
-    { MKD_NODLDISCOUNT,   "!DLDISCOUNT" },
+    { MKD_DLDISCOUNT,     "DLDISCOUNT" },
     { MKD_DLEXTRA,        "DLEXTRA" },
     { MKD_FENCEDCODE,     "FENCEDCODE" },
     { MKD_IDANCHOR,       "IDANCHOR" },
     { MKD_GITHUBTAGS,     "GITHUBTAGS" },
+    { MKD_NORMAL_LISTITEM,  "NORMAL_LISTITEM" },
     { MKD_URLENCODEDANCHOR, "URLENCODEDANCHOR" },
     { MKD_LATEX,          "LATEX" },
     { MKD_EXPLICITLIST,   "EXPLICITLIST" },
diff --git a/generate.c b/generate.c
index 0831925..30acb64 100644
--- a/generate.c
+++ b/generate.c
@@ -1352,7 +1352,6 @@ text(MMIOT *f)
 		    break;
 	/* A^B -> A<sup>B</sup> */
 	case '^':   if ( is_flag_set(f->flags, MKD_NOSUPERSCRIPT)
-			    || is_flag_set(f->flags, MKD_STRICT)
 			    || is_flag_set(f->flags, MKD_TAGTEXT)
 			    || (f->last == 0)
 			    || ((ispunct(f->last) || isspace(f->last))
@@ -1390,7 +1389,7 @@ text(MMIOT *f)
 		    break;
 	case '_':
 	/* Underscores don't count if they're in the middle of a word */
-		    if ( !(is_flag_set(f->flags, MKD_NORELAXED) || is_flag_set(f->flags, MKD_STRICT))
+		    if ( !is_flag_set(f->flags, MKD_NORELAXED)
 				&& isthisalnum(f,-1) && isthisalnum(f,1) ) {
 			Qchar(c, f);
 			break;
@@ -1413,7 +1412,6 @@ text(MMIOT *f)
 		    break;
 	
 	case '~':   if ( is_flag_set(f->flags, MKD_NOSTRIKETHROUGH)
-			 || is_flag_set(f->flags, MKD_STRICT)
 			 || is_flag_set(f->flags, MKD_TAGTEXT)
 			 || ! tickhandler(f,c,2,0, delspan) )
 			Qchar(c, f);
@@ -1437,8 +1435,7 @@ text(MMIOT *f)
 				}
 				
 				break;
-		    case '^':   if ( is_flag_set(f->flags, MKD_STRICT)
-					|| is_flag_set(f->flags, MKD_NOSUPERSCRIPT) ) {
+		    case '^':   if ( is_flag_set(f->flags, MKD_NOSUPERSCRIPT) ) {
 				    Qchar('\\', f);
 				    shift(f,-1);
 				    break;
@@ -1779,7 +1776,6 @@ htmlify_paragraphs(Paragraph *p, MMIOT *f)
 }
 
 
-#ifdef GITHUB_CHECKBOX
 static void
 li_htmlify(Paragraph *p, char *arguments, mkd_flag_t flags, MMIOT *f)
 {
@@ -1808,7 +1804,6 @@ li_htmlify(Paragraph *p, char *arguments, mkd_flag_t flags, MMIOT *f)
      Qprintf(f, "</li>");
     ___mkd_emblock(f);
 }
-#endif
 
 
 static void
@@ -1860,11 +1855,7 @@ listdisplay(int typ, Paragraph *p, MMIOT* f)
 	Qprintf(f, ">\n");
 
 	for ( ; p ; p = p->next ) {
-#ifdef GITHUB_CHECKBOX
 	    li_htmlify(p->down, p->ident, p->flags, f);
-#else
-	    htmlify(p->down, "li", p->ident, f);
-#endif
 	    Qchar('\n', f);
 	}
 
diff --git a/github_flavoured.c b/github_flavoured.c
index 019f783..f7a40cd 100644
--- a/github_flavoured.c
+++ b/github_flavoured.c
@@ -59,8 +59,7 @@ gfm_populate(getc_func getc, void* ctx, int flags)
 
     DELETE(line);
 
-    if ( (pandoc == 3) && !(is_flag_set(flags, MKD_NOHEADER)
-     || is_flag_set(flags, MKD_STRICT)) ) {
+    if ( (pandoc == 3) && !is_flag_set(flags, MKD_NOHEADER) ) {
 	/* the first three lines started with %, so we have a header.
 	 * clip the first three lines out of content and hang them
 	 * off header.
diff --git a/main.c b/main.c
index 65985f2..79f83ce 100644
--- a/main.c
+++ b/main.c
@@ -263,8 +263,10 @@ main(int argc, char **argv)
     if ( version ) {
 	printf("%s: discount %s%s", pgm, markdown_version,
 				  with_html5 ? " +html5":"");
-	if ( version > 1 )
+	if ( version == 2 )
 	    mkd_flags_are(stdout, flags, 0);
+	if ( version >= 3 )
+	    printf(" MARKDOWN_FLAGS=0x%08x", flags);
 	putchar('\n');
 	exit(0);
     }
@@ -308,7 +310,7 @@ main(int argc, char **argv)
 	if ( squash )
 	    mkd_e_anchor(doc, (mkd_callback_t) anchor_format);
 	if ( use_e_codefmt )
-	    mkd_e_code_format(doc, external_codefmt);
+	    mkd_e_code_format(doc, (mkd_callback_t)external_codefmt);
 
 	if ( use_e_codefmt || squash )
 	    mkd_e_free(doc, free_it);
diff --git a/markdown.c b/markdown.c
index 9ff8c28..2e068e2 100644
--- a/markdown.c
+++ b/markdown.c
@@ -445,7 +445,7 @@ end_of_block(Line *t, mkd_flag_t flags)
 static Line*
 is_discount_dt(Line *t, int *clip, mkd_flag_t flags)
 {
-    if ( !is_flag_set(flags, MKD_NODLDISCOUNT)
+    if ( is_flag_set(flags, MKD_DLDISCOUNT)
 	   && t
 	   && t->next
 	   && (S(t->text) > 2)
@@ -518,8 +518,7 @@ islist(Line *t, int *clip, mkd_flag_t flags, int *list_type)
     if ( end_of_block(t, flags) )
 	return 0;
 
-    if ( !(is_flag_set(flags, MKD_NODLIST) || is_flag_set(flags, MKD_STRICT))
-				      && isdefinition(t,clip,list_type,flags) )
+    if ( is_flag_set(flags, MKD_DLIST) && isdefinition(t,clip,list_type,flags) )
 	return DL;
 
     if ( strchr("*-+", T(t->text)[t->dle]) && isspace(T(t->text)[t->dle+1]) ) {
@@ -532,7 +531,7 @@ islist(Line *t, int *clip, mkd_flag_t flags, int *list_type)
     if ( (j = nextblank(t,t->dle)) > t->dle ) {
 	if ( T(t->text)[j-1] == '.' ) {
 
-	    if ( !(is_flag_set(flags, MKD_NOALPHALIST) || is_flag_set(flags, MKD_STRICT))
+	    if ( !is_flag_set(flags, MKD_NOALPHALIST)
 			  && (j == t->dle + 2)
 			  && isalpha(T(t->text)[t->dle]) ) {
 		j = nextnonblank(t,j);
@@ -755,7 +754,7 @@ isdivmarker(Line *p, int start, mkd_flag_t flags)
     char *s;
     int last, i;
 
-    if ( is_flag_set(flags, MKD_NODIVQUOTE) || is_flag_set(flags, MKD_STRICT) )
+    if ( is_flag_set(flags, MKD_NODIVQUOTE) )
 	return 0;
 
     start = nextnonblank(p, start);
@@ -854,20 +853,17 @@ listitem(Paragraph *p, int indent, mkd_flag_t flags, linefn check)
     Line *t, *q;
     int clip = indent;
     int z;
-#ifdef GITHUB_CHECKBOX
     int firstpara = 1;
     int ischeck;
 #define CHECK_NOT 0
 #define CHECK_NO 1
 #define CHECK_YES 2
-#endif
 
     for ( t = p->text; t ; t = q) {
 	UNCHECK(t);
 	__mkd_trim_line(t, clip);
 
-#ifdef GITHUB_CHECKBOX
-	if ( firstpara ) {
+	if ( firstpara && !is_flag_set(flags, MKD_NORMAL_LISTITEM) ) {
 	    ischeck = CHECK_NOT;
 	    if ( strncmp(T(t->text)+t->dle, "[ ]", 3) == 0 )
 		ischeck = CHECK_NO;
@@ -882,7 +878,6 @@ listitem(Paragraph *p, int indent, mkd_flag_t flags, linefn check)
 	    }
 	    firstpara = 0;
 	}
-#endif
 
         /* even though we had to trim a long leader off this item,
          * the indent for trailing paragraphs is still 4...
@@ -1268,7 +1263,7 @@ actually_a_table(MMIOT *f, Line *pp)
     int c;
 
     /* tables need to be turned on */
-    if ( is_flag_set(f->flags, MKD_STRICT) || is_flag_set(f->flags, MKD_NOTABLES) )
+    if ( is_flag_set(f->flags, MKD_NOTABLES) )
 	return 0;
 
     /* tables need three lines */
diff --git a/markdown.h b/markdown.h
index 5cb897f..438a489 100644
--- a/markdown.h
+++ b/markdown.h
@@ -55,11 +55,9 @@ typedef struct paragraph {
 	   HDR, HR, TABLE, SOURCE } typ;
     enum { IMPLICIT=0, PARA, CENTER} align;
     int hnumber;		/* <Hn> for typ == HDR */
-#if GITHUB_CHECKBOX
     int flags;
 #define GITHUB_CHECK		0x01
 #define IS_CHECKED		0x02
-#endif
 } Paragraph;
 
 enum { ETX, SETEXT };	/* header types */
@@ -135,7 +133,7 @@ typedef struct mmiot {
 #define MKD_NOIMAGE	0x00000002
 #define MKD_NOPANTS	0x00000004
 #define MKD_NOHTML	0x00000008
-#define MKD_STRICT	0x00000010
+#define MKD_NORMAL_LISTITEM 0x00000010
 #define MKD_TAGTEXT	0x00000020
 #define MKD_NO_EXT	0x00000040
 #define MKD_CDATA	0x00000080
@@ -151,10 +149,9 @@ typedef struct mmiot {
 #define MKD_TABSTOP	0x00020000
 #define MKD_NODIVQUOTE	0x00040000
 #define MKD_NOALPHALIST	0x00080000
-#define MKD_NODLIST	0x00100000
 #define MKD_EXTRA_FOOTNOTE 0x00200000
 #define MKD_NOSTYLE	0x00400000
-#define MKD_NODLDISCOUNT 0x00800000
+#define MKD_DLDISCOUNT  0x00800000
 #define	MKD_DLEXTRA	0x01000000
 #define MKD_FENCEDCODE	0x02000000
 #define MKD_IDANCHOR	0x04000000
@@ -166,6 +163,13 @@ typedef struct mmiot {
 #define USER_FLAGS	0xFFFFFFFF
 #define INPUT_MASK	(MKD_NOHEADER|MKD_TABSTOP)
 
+/* composite flags */
+#define MKD_DLIST	MKD_DLDISCOUNT|MKD_DLEXTRA
+#define MKD_STRICT	MKD_NOSUPERSCRIPT|MKD_NORELAXED|MKD_NOSTRIKETHROUGH| \
+			MKD_NOHEADER|MKD_NOALPHALIST|MKD_NODIVQUOTE| \
+			MKD_NOTABLES|MKD_NO_EXT|MKD_NOSTYLE|MKD_NORMAL_LISTITEM| \
+			MKD_TABSTOP
+
     Callback_data *cb;
 } MMIOT;
 
diff --git a/mkdio.c b/mkdio.c
index 78e18fe..6bdcbdf 100644
--- a/mkdio.c
+++ b/mkdio.c
@@ -128,7 +128,7 @@ populate(getc_func getc, void* ctx, mkd_flag_t flags)
 
     DELETE(line);
 
-    if ( (pandoc == 3) && !(is_flag_set(flags, MKD_NOHEADER) || is_flag_set(flags, MKD_STRICT)) ) {
+    if ( (pandoc == 3) && !is_flag_set(flags, MKD_NOHEADER) ) {
 	/* the first three lines started with %, so we have a header.
 	 * clip the first three lines out of content and hang them
 	 * off header.
diff --git a/mkdio.h.in b/mkdio.h.in
index 251437c..7a9a581 100644
--- a/mkdio.h.in
+++ b/mkdio.h.in
@@ -87,7 +87,7 @@ void mkd_ref_prefix(MMIOT*, char*);
 #define MKD_NOIMAGE	0x00000002	/* don't do image processing, block <img> */
 #define MKD_NOPANTS	0x00000004	/* don't run smartypants() */
 #define MKD_NOHTML	0x00000008	/* don't allow raw html through AT ALL */
-#define MKD_STRICT	0x00000010	/* disable SUPERSCRIPT, RELAXED_EMPHASIS */
+#define MKD_NORMAL_LISTITEM 0x00000010	/* disable github-style checkbox lists */
 #define MKD_TAGTEXT	0x00000020	/* process text inside an html tag; no
 					 * <em>, no <bold>, no html or [] expansion */
 #define MKD_NO_EXT	0x00000040	/* don't allow pseudo-protocols */
@@ -105,10 +105,9 @@ void mkd_ref_prefix(MMIOT*, char*);
 #define MKD_TABSTOP	0x00020000	/* expand tabs to 4 spaces */
 #define MKD_NODIVQUOTE	0x00040000	/* forbid >%class% blocks */
 #define MKD_NOALPHALIST	0x00080000	/* forbid alphabetic lists */
-#define MKD_NODLIST	0x00100000	/* forbid definition lists */
 #define MKD_EXTRA_FOOTNOTE 0x00200000	/* enable markdown extra-style footnotes */
 #define MKD_NOSTYLE	0x00400000	/* don't extract <style> blocks */
-#define MKD_NODLDISCOUNT 0x00800000	/* disable discount-style definition lists */
+#define MKD_DLDISCOUNT	0x00800000	/* enable discount-style definition lists */
 #define	MKD_DLEXTRA	0x01000000	/* enable extra-style definition lists */
 #define MKD_FENCEDCODE	0x02000000	/* enabled fenced code blocks */
 #define MKD_IDANCHOR	0x04000000	/* use id= anchors for TOC links */
@@ -118,6 +117,12 @@ void mkd_ref_prefix(MMIOT*, char*);
 #define MKD_EXPLICITLIST 0x80000000	/* don't combine numbered/bulletted lists */
 
 #define MKD_EMBED	MKD_NOLINKS|MKD_NOIMAGE|MKD_TAGTEXT
+#define MKD_DLIST	MKD_DLDISCOUNT|MKD_DLEXTRA
+#define MKD_STRICT	MKD_NOSUPERSCRIPT|MKD_NORELAXED|MKD_NOSTRIKETHROUGH| \
+			MKD_NOHEADER|MKD_NOALPHALIST|MKD_NODIVQUOTE| \
+			MKD_NOTABLES|MKD_NO_EXT|MKD_NOSTYLE|MKD_NORMAL_LISTITEM| \
+			MKD_TABSTOP
+
 
 /* special flags for mkd_in() and mkd_string()
  */
diff --git a/pgm_options.c b/pgm_options.c
index 5c98bf7..c8f54ee 100644
--- a/pgm_options.c
+++ b/pgm_options.c
@@ -24,45 +24,51 @@ static struct _opt {
     char *name;
     char *desc;
     int off;
-    int skip; /* this opt is a synonym */
+    int skip; 		/* this opt is a synonym; don't display in -F? */
+    int composite;	/* composite flag; don't display in -F? */
     int sayenable;
-    mkd_flag_t flag;
+    mkd_flag_t flag;	/* flags to set/clear */
+    mkd_flag_t unflag;	/* flags to clear/set */
 } opts[] = {
-    { "tabstop",       "default (4-space) tabstops", 0, 0, 1, MKD_TABSTOP  },
-    { "image",         "images",                     1, 0, 1, MKD_NOIMAGE  },
-    { "links",         "links",                      1, 0, 1, MKD_NOLINKS  },
-    { "relax",         "emphasis inside words",      1, 1, 1, MKD_STRICT   },
-    { "strict",        "emphasis inside words",      0, 0, 1, MKD_STRICT   },
-    { "tables",        "tables",                     1, 0, 1, MKD_NOTABLES },
-    { "header",        "pandoc-style headers",       1, 0, 1, MKD_NOHEADER },
-    { "html",          "raw html",                   1, 0, 1, MKD_NOHTML   },
-    { "ext",           "extended protocols",         1, 0, 1, MKD_NO_EXT   },
-    { "cdata",         "generate cdata",             0, 0, 0, MKD_CDATA    },
-    { "smarty",        "smartypants",                1, 0, 1, MKD_NOPANTS  },
-    { "pants",         "smartypants",                1, 1, 1, MKD_NOPANTS  },
-    { "toc",           "tables of contents",         0, 0, 1, MKD_TOC      },
-    { "autolink",      "autolinking",                0, 0, 1, MKD_AUTOLINK },
-    { "safelink",      "safe links",                 0, 0, 1, MKD_SAFELINK },
-    { "strikethrough", "strikethrough",              1, 0, 1, MKD_NOSTRIKETHROUGH },
-    { "del",           "strikethrough",              1, 1, 1, MKD_NOSTRIKETHROUGH },
-    { "superscript",   "superscript",                1, 0, 1, MKD_NOSUPERSCRIPT },
-    { "emphasis",      "emphasis inside words",      0, 0, 1, MKD_NORELAXED },
-    { "divquote",      ">%class% blockquotes",       1, 0, 1, MKD_NODIVQUOTE },
-    { "alphalist",     "alpha lists",                1, 0, 1, MKD_NOALPHALIST },
-    { "definitionlist","definition lists",           1, 0, 1, MKD_NODLIST },
-    { "1.0",           "markdown 1.0 compatibility", 0, 0, 1, MKD_1_COMPAT },
-    { "footnotes",     "markdown extra footnotes",   0, 0, 1, MKD_EXTRA_FOOTNOTE },
-    { "footnote",      "markdown extra footnotes",   0, 1, 1, MKD_EXTRA_FOOTNOTE },
-    { "style",         "extract style blocks",       1, 0, 1, MKD_NOSTYLE },
-    { "dldiscount",    "discount-style definition lists", 1, 0, 1, MKD_NODLDISCOUNT },
-    { "dlextra",       "extra-style definition lists", 0, 0, 1, MKD_DLEXTRA },
-    { "fencedcode",    "fenced code blocks",         0, 0, 1, MKD_FENCEDCODE },
-    { "idanchor",      "id= anchors in TOC",         0, 0, 1, MKD_IDANCHOR },
-    { "githubtags",    "permit - and _ in element names", 0, 0, 0, MKD_GITHUBTAGS },
-    { "urlencodedanchor", "html5-style anchors", 0, 0, 0, MKD_URLENCODEDANCHOR },
-    { "html5anchor",   "html5-style anchors", 0, 1, 0, MKD_URLENCODEDANCHOR },
-    { "latex",         "handle LaTeX escapes",         0, 0, 1, MKD_LATEX },
-    { "explicitlist",  "do not merge adjacent numeric/bullet lists", 0, 0, 1, MKD_EXPLICITLIST },
+    { "tabstop",       "default (4-space) tabstops", 0, 0, 0, 1, MKD_TABSTOP  },
+    { "image",         "images",                     1, 0, 0, 1, MKD_NOIMAGE  },
+    { "links",         "links",                      1, 0, 0, 1, MKD_NOLINKS  },
+    { "strict",        "emphasis inside words",      0, 0, 0, 1, MKD_NORELAXED  },
+    { "relax",         "emphasis inside words",      1, 1, 0, 1, MKD_NORELAXED  },
+    { "tables",        "tables",                     1, 0, 0, 1, MKD_NOTABLES },
+    { "header",        "pandoc-style headers",       1, 0, 0, 1, MKD_NOHEADER },
+    { "html",          "allow raw html",             1, 0, 0, 0, MKD_NOHTML   },
+    { "ext",           "extended protocols",         1, 0, 0, 1, MKD_NO_EXT   },
+    { "cdata",         "generate cdata",             0, 0, 0, 0, MKD_CDATA    },
+    { "smarty",        "smartypants",                1, 0, 0, 1, MKD_NOPANTS  },
+    { "pants",         "smartypants",                1, 1, 0, 1, MKD_NOPANTS  },
+    { "toc",           "tables of contents",         0, 0, 0, 1, MKD_TOC      },
+    { "autolink",      "autolinking",                0, 0, 0, 1, MKD_AUTOLINK },
+    { "safelink",      "safe links",                 0, 0, 0, 1, MKD_SAFELINK },
+    { "strikethrough", "strikethrough",              1, 0, 0, 1, MKD_NOSTRIKETHROUGH },
+    { "del",           "strikethrough",              1, 1, 0, 1, MKD_NOSTRIKETHROUGH },
+    { "superscript",   "superscript",                1, 0, 0, 1, MKD_NOSUPERSCRIPT },
+    { "divquote",      ">%class% blockquotes",       1, 0, 0, 1, MKD_NODIVQUOTE },
+    { "alphalist",     "alpha lists",                1, 0, 0, 1, MKD_NOALPHALIST },
+    { "definitionlist","both discount & markdown extra definition lists", 0, 0, 1, 1, MKD_DLIST },
+    { "dlist",         "both discount & markdown extra definition lists", 0, 1, 1, 1, MKD_DLIST },
+    { "1.0",           "markdown 1.0 compatibility", 0, 0, 0, 1, MKD_1_COMPAT },
+    { "footnotes",     "markdown extra footnotes",   0, 0, 0, 1, MKD_EXTRA_FOOTNOTE },
+    { "footnote",      "markdown extra footnotes",   0, 1, 0, 1, MKD_EXTRA_FOOTNOTE },
+    { "style",         "extract style blocks",       1, 0, 0, 1, MKD_NOSTYLE },
+    { "dldiscount",    "discount-style definition lists", 0, 0, 0, 1, MKD_DLDISCOUNT },
+    { "dlextra",       "markdown extra-style definition lists", 0, 0, 0, 1, MKD_DLEXTRA },
+    { "fencedcode",    "fenced code blocks",         0, 0, 0, 1, MKD_FENCEDCODE },
+    { "idanchor",      "id= anchors in TOC",         0, 0, 0, 1, MKD_IDANCHOR },
+    { "githubtags",    "- and _ in element names",   0, 0, 0, 1, MKD_GITHUBTAGS },
+    { "urlencodedanchor", "html5-style anchors",     0, 0, 0, 1, MKD_URLENCODEDANCHOR },
+    { "html5anchor",   "html5-style anchors",        0, 1, 0, 1, MKD_URLENCODEDANCHOR },
+    { "latex",         "LaTeX escapes",              0, 0, 0, 1, MKD_LATEX },
+    { "explicitlist",  "merge adjacent numeric/bullet lists", 0, 0, 0, 0, MKD_EXPLICITLIST },
+    { "github-listitem","github-style check items",  1, 0, 0, 1, MKD_NORMAL_LISTITEM } ,
+    { "regular-listitem","github-style check items", 0, 1, 0, 1, MKD_NORMAL_LISTITEM } ,
+    { "standard",      "conform to the markdown standard", 0, 0, 1, 0, MKD_STRICT,
+	 MKD_FENCEDCODE|MKD_LATEX|MKD_TABSTOP|MKD_EXTRA_FOOTNOTE|MKD_AUTOLINK|MKD_SAFELINK|MKD_TOC|MKD_DLIST },
 } ;
 
 #define NR(x)	(sizeof x / sizeof x[0])
@@ -99,7 +105,7 @@ show_flags(int byname, int verbose)
 	qsort(opts, NR(opts), sizeof(opts[0]), (stfu)sort_by_flag);
 	
 	for (i=0; i < NR(opts); i++)
-	    if ( !opts[i].skip ) {
+	    if ( !(opts[i].skip || opts[i].composite) ) {
 		fprintf(stderr, "%08lx : ", (long)opts[i].flag);
 		if ( opts[i].sayenable )
 		    fprintf(stderr, opts[i].off ? "disable " : "enable ");
@@ -134,10 +140,16 @@ set_flag(mkd_flag_t *flags, char *optionstring)
 	    if ( opts[i].off )
 		enable = !enable;
 		
-	    if ( enable )
+	    if ( enable ) {
 		*flags |= opts[i].flag;
-	    else
+		if ( opts[i].unflag )
+		    *flags &= ~opts[i].unflag;
+	    }
+	    else {
 		*flags &= ~opts[i].flag;
+		if ( opts[i].unflag )
+		    *flags |= opts[i].unflag;
+	    }
 	}
 	else
 	    return arg;
diff --git a/tests/dl.t b/tests/dl.t
index c59088d..8edaf7f 100644
--- a/tests/dl.t
+++ b/tests/dl.t
@@ -19,9 +19,9 @@ RSLT='<dl>
 </dl>'
 
 # discount style
-try -fdefinitionlist '=tag= generates definition lists' "$SRC" "$RSLT"
+try -fdldiscount '=tag= generates definition lists' "$SRC" "$RSLT"
 
-try 'one item with two =tags=' \
+try -fdldiscount 'one item with two =tags=' \
     '=this=
 =is=
     A test, eh?' \
@@ -32,7 +32,7 @@ try 'one item with two =tags=' \
 </dl>'
 
 # extra style
-try -fnodefinitionlist,dlextra '=tag= does nothing' "$SRC" \
+try -fdlextra '=tag= does nothing' "$SRC" \
     '<p>=this=
     is an ugly
 =test=
@@ -90,12 +90,12 @@ RSLT='<p>foo
 
 <p>=this=
     is ugly</p>'
-try -fnodldiscount '... with definitionlists enabled but all styles disabled' \
+try -fdlist,nodldiscount,nodlextra '... with definitionlists enabled but all styles disabled' \
 "$SRC" \
 "$RSLT"
-try -fnodefinitionlist,dldiscount,dlextra '... with definitionlists disabled but all styles enabled' \
-    "$SRC" \
-    "$RSLT"
+#try -fnodefinitionlist,dldiscount,dlextra '... with definitionlists disabled but all styles enabled' \
+#    "$SRC" \
+#    "$RSLT"
 
 summary $0
 exit $rc
diff --git a/tests/list.t b/tests/list.t
index 69b5b52..1fd6395 100644
--- a/tests/list.t
+++ b/tests/list.t
@@ -124,7 +124,7 @@ try 'blockquote inside a list' \
 <blockquote><p>This is a quote insde a list item.</p></blockquote></li>
 </ul>'
 
-try 'dl followed by non-dl' \
+try -fdlist 'dl followed by non-dl' \
     '=a=
     test
 2. here' \
@@ -137,7 +137,7 @@ try 'dl followed by non-dl' \
 <li>here</li>
 </ol>'
 
-try 'non-dl followed by dl' \
+try -fdlist 'non-dl followed by dl' \
     '1. hello
 =sailor=
     hi!' \
diff --git a/tests/superscript.t b/tests/superscript.t
index 7e74276..b7720d6 100644
--- a/tests/superscript.t
+++ b/tests/superscript.t
@@ -5,8 +5,8 @@ title "superscript"
 rc=0
 MARKDOWN_FLAGS=0x0; export MARKDOWN_FLAGS
 
-try -frelax  'A^B -> A<sup>B</sup> (-frelax)' 'A^B' '<p>A<sup>B</sup></p>'
-try -fstrict 'A^B != A<sup>B</sup> (-fstrict)' 'A^B' '<p>A^B</p>'
+try -fsuperscript  'A^B -> A<sup>B</sup> (-fsuperscript)' 'A^B' '<p>A<sup>B</sup></p>'
+try -fstandard 'A^B != A<sup>B</sup> (-fstandard)' 'A^B' '<p>A^B</p>'
 try -fnosuperscript 'A^B != A<sup>B</sup> (-fnosuperscript)' 'A^B' '<p>A^B</p>'
 try -frelax 'A^B in link title' '[link](here "A^B")' '<p><a href="here" title="A^B">link</a></p>'
 try 'A^(B+2)C^2' 'A^(B+2)C^2' '<p>A<sup>B+2</sup>C<sup>2</sup></p>'
diff --git a/version.c.in b/version.c.in
index b2c17c3..1fa4f12 100644
--- a/version.c.in
+++ b/version.c.in
@@ -7,7 +7,9 @@ char markdown_version[] = BRANCH VERSION
 #if USE_AMALLOC
 		" DEBUG"
 #endif
-#if GITHUB_CHECKBOX
-		" GITHUB_CHECKBOX"
+#if CHECKBOX_AS_INPUT
+		" GHC=INPUT"
+#else
+		" GHC=ENTITY"
 #endif
 		;