Problem with setting users picture folder

I have a problem with setting users picture folder in my server and alos some other guys. discussion about .
it's not the complete solution , but at least it solved my problem. i don't know the reason, but it seems that field data of form picture section doesn't sent to the user_configure function.

diff  user.module new_user.module
1952c1952,1953
<   if (variable_get('user_pictures', 0)) {
---
>   /*
>   if (variable_get('user_pictures', 0) and variable_get('user_picture_path','')) {
1953a1955
>     $picture_path='pictures';
1955a1958
>   */