Problem with packing headers

Hi, list.
Writing http_header_pack function I get strange behavour for
some web sites.

1)
GET /img/eslogo0P.wbmp HTTP/1.1
Host: wap.eurosport.com
Accept: text/html
Accept: image/vnd.wap.wbmp

Works.

2)
GET /img/eslogo0P.wbmp HTTP/1.1
Host: wap.eurosport.com
Accept: text/html, image/vnd.wap.wbmp

Works.

3)
GET /img/eslogo0P.wbmp HTTP/1.1
Host: wap.eurosport.com
Accept: text/html,
  image/vnd.wap.wbmp

HTTP/1.1 406 No acceptable objects were found
Server: Microsoft-IIS/5.0
--skipped--


As I undestand from HTTP specification all 3 requests are completly
equivalent. And my http_header_pack realization make 1->3
translation.
So question is: do I misundestand specifications or something else?

P.S.
http_header_pack realization (http.c):

static int http_header_cmp(void *a, void *b) {
   Octstr *header,*pat;

   header = a;
   pat = b;

   if (octstr_ncompare(header, pat, octstr_len(pat)) == 0) {
     return 1;
   }

   return 0;
}

void http_header_pack(List *headers)
{
   List *new_headers;
   Octstr *curr,*name,*value;
   int i;

   gwlib_assert_init();
   gw_assert(headers != NULL);

   new_headers = http_create_empty_headers();

   for (i = 0; i < list_len(headers); i++) {
     http_header_get(headers, i, &name, &value);
     if ((curr = list_search(new_headers, name, http_header_cmp)) == NULL) {
       http_header_add(new_headers, octstr_get_cstr(name), octstr_get_cstr(value));
     } else {
       octstr_append_cstr(curr,",\r\n ");
       octstr_append(curr,value);
     }
     octstr_destroy(name);
     octstr_destroy(value);

   }

   http_header_combine(headers, new_headers);
   http_destroy_headers(new_headers);
}

-- 
Vjacheslav Chekushin                                mailto:[email protected]
Latvian Mobile Phone Company                        http://www.lmt.lv