diff --git a/src/ce_d2syn.pas b/src/ce_d2syn.pas
index a5896011..870a70e2 100644
--- a/src/ce_d2syn.pas
+++ b/src/ce_d2syn.pas
@@ -815,11 +815,15 @@ begin
     exit;
   end else readerReset;
 
-  // numbers 1
+  // numbers
   if (isNumber(reader^)) then
   begin
-    while isAlNum(readerNext^) or (reader^ = '_') or (reader^ = '.') do (*!*);
-    fTokKind := tkNumbr;
+    while isHex(readerNext^) or (reader^ = '_') or (reader^ = '.')
+      or (reader^ in ['x', 'X', 'u', 'U', 'L', 'i']) do (*!*);
+    if isWhite(reader^) or isSymbol(reader^) or isOperator1(reader^) then
+      fTokKind := tkNumbr
+    else
+      fTokKind := tkError;
     exit;
   end;
 
@@ -828,6 +832,8 @@ begin
   begin
     fTokKind := tkSymbl;
     case reader^ of
+      ';': if (fTokStop>1) and ((reader-1)^ = '}') then
+        fTokKind := tkError;
       '{': StartCodeFoldBlock(nil, fkBrackets in fFoldKinds);
       '}':
       begin
@@ -846,7 +852,7 @@ begin
     exit;
   end;
 
-  // symbChars 2: operators
+  // operators
   if isOperator1(reader^) then
   begin
     fTokKind := tkSymbl;
@@ -859,7 +865,9 @@ begin
         end;
       3:begin
           if (not isOperator1(reader^)) and
-            isOperator3(fLineBuf[fTokStart..fTokStop-1])
+            (isOperator3(fLineBuf[fTokStart..fTokStop-1]) or
+              (isOperator2(fLineBuf[fTokStart..fTokStop-2]) and
+                isPostOpSymbol(fLineBuf[fTokStop-1])))
           then exit;
         end;
       2:begin
@@ -871,9 +879,9 @@ begin
           if not isOperator1(reader^) then exit;
         end;
     end;
-    if isWhite(reader^) then
-      exit;
-    fTokKind := tkIdent; // invalid op not colorized.
+    fTokKind := tkError;
+    //if isWhite(reader^) then
+    exit;
   end;
 
   //Keyword - identifiers
diff --git a/src/ce_dlangutils.pas b/src/ce_dlangutils.pas
index 4c6fff91..a79fbcb4 100644
--- a/src/ce_dlangutils.pas
+++ b/src/ce_dlangutils.pas
@@ -27,6 +27,7 @@ function isAlNum(const c: Char): boolean; {$IFNDEF DEBUG}inline;{$ENDIF}
 function isHex(const c: Char): boolean; {$IFNDEF DEBUG}inline;{$ENDIF}
 function isSymbol(const c: char): boolean; {$IFNDEF DEBUG}inline;{$ENDIF}
 function isPtrOperator(const c: char): boolean; {$IFNDEF DEBUG}inline;{$ENDIF}
+function isPostOpSymbol(const c: char): boolean; {$IFNDEF DEBUG} inline; {$ENDIF}
 function isOperator1(const c: char): boolean; {$IFNDEF DEBUG}inline;{$ENDIF}
 function isOperator2(const s: string): boolean; {$IFNDEF DEBUG}inline;{$ENDIF}
 function isOperator3(const s: string): boolean; {$IFNDEF DEBUG} inline; {$ENDIF}
@@ -101,6 +102,11 @@ begin
   exit(c in ['&', '*']);
 end;
 
+function isPostOpSymbol (const c: char): boolean; {$IFNDEF DEBUG}inline;{$ENDIF}
+begin
+  exit(c in ['+', '-', '*', '&']);
+end;
+
 function isOperator1(const c: char): boolean; {$IFNDEF DEBUG}inline;{$ENDIF}
 begin
   exit(c in ['/', '*', '-', '+', '%', '>', '<', '=', '!', '&', '|', '^', '~']);
diff --git a/wiki/wiki.todo.txt b/wiki/wiki.todo.txt
index e69de29b..b268e72d 100644
--- a/wiki/wiki.todo.txt
+++ b/wiki/wiki.todo.txt
@@ -0,0 +1 @@
+- new symbolic strings, ENV_XXX, see issue #27
\ No newline at end of file