c-hanging-braces-alist customization shows no syntactic symbols

[Stephanos Piperoglou]

GNU Emacs 21.3 / Windows 2000 + CygWin

I'm trying to customize my c-hanging-braces-alist and custom doesn't 
show the list of syntactic symbols correctly. See below for a snippet of 
what I get when I M-x customize-variable c-hanging-braces-alist. As you 
can see custom has trouble getting these symbols, and I can find nowhere 
where the entire list is mentioned and documented. I don't mind hacking 
my .emacs file by hand for these (in fact I'd rather define my own 
c-style, as this is meant for use with JDE), so my question really is 
where can I get a list of syntactic symbols that apply to 
c-hanging-braces-alist?

Is this a known issue in 21.3? Is it fixed in the devel branch?

==== SNIP ====
( ) Override style settings:
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
   [ ] nil                 : Choice Newline [ ] before, [ ] after brace
  State: this option has been set and saved.
==== SNIP ====