how to reproduce: 
Bug reproduces itself when function cli_list_new is called. This happens, for 
example, when smbclient does ls or libsmbclient does the call. 
Connect to Win XP SP2 service, find a dir with list of files huge enough to 
be listed in more then one request. Do ls to invoke the cli_list_new.. It will 
get cycled. 
 
The problem is that listing doesn't resume from the right position. First i can 
receive 31 files (. .. film.avi, etc.) but after that i will receive the same 
31 minus first one file. 
 
Possible fix for me may look like this patch for cli_list.c 
208,209c208,214 
<                          can miss filenames. Use last filename continue 
instead. JRA */ 
<                       SSVAL(param,10,(FLAG_TRANS2_FIND_REQUIRE_RESUME|
FLAG_TRANS2_FIND_CLOSE_IF_END));        /* resume required + close on end */ 
--- 
>                          can miss filenames. Use last filename continue 
instead. JRA */ 
>                       if (strcmp(cli->server_os,"Windows 5.1")==0) { 
>                       /* But we still need this flag for WIN XP SP2 machines 
*/ 
>                           SSVAL(param,10,(FLAG_TRANS2_FIND_CONTINUE|
FLAG_TRANS2_FIND_REQUIRE_RESUME|FLAG_TRANS2_FIND_CLOSE_IF_END)); 
>                       } else { 
>                           SSVAL(param,10,(FLAG_TRANS2_FIND_REQUIRE_RESUME|
FLAG_TRANS2_FIND_CLOSE_IF_END));    /* resume required + close on end */ 
>                       }