--- code/trunk/pcre_compile.c	2011/08/02 11:00:40	654
+++ code/trunk/pcre_compile.c	2011/08/21 09:00:54	661
@@ -2295,8 +2295,13 @@
 A user pointed out that PCRE was rejecting [:a[:digit:]] whereas Perl was not.
 It seems that the appearance of a nested POSIX class supersedes an apparent
 external class. For example, [:a[:digit:]b:] matches "a", "b", ":", or
-a digit. Also, unescaped square brackets may also appear as part of class
-names. For example, [:a[:abc]b:] gives unknown class "[:abc]b:]"in Perl.
+a digit. 
+
+In Perl, unescaped square brackets may also appear as part of class names. For
+example, [:a[:abc]b:] gives unknown POSIX class "[:abc]b:]". However, for
+[:a[:abc]b][b:] it gives unknown POSIX class "[:abc]b][b:]", which does not
+seem right at all. PCRE does not allow closing square brackets in POSIX class 
+names.
 
 Arguments:
   ptr      pointer to the initial [
@@ -2314,6 +2319,7 @@
   {
   if (*ptr == CHAR_BACKSLASH && ptr[1] == CHAR_RIGHT_SQUARE_BRACKET)
     ptr++;
+  else if (*ptr == CHAR_RIGHT_SQUARE_BRACKET) return FALSE;   
   else
     {
     if (*ptr == terminator && ptr[1] == CHAR_RIGHT_SQUARE_BRACKET)