I am guessing your talking about through their MyHome so in changebasic.php find
if ( ($HTTP_POST_FILES['userfile']['tmp_name'] != "none") && ($HTTP_POST_FILES['userfile']['tmp_name']) ){
copy($HTTP_POST_FILES['userfile']['tmp_name'], "{$config['avatars']}/$Picturefile");
}
and change it to
if ( ($HTTP_POST_FILES['userfile']['tmp_name'] != "none") && ($HTTP_POST_FILES['userfile']['tmp_name']) ){
copy($HTTP_POST_FILES['userfile']['tmp_name'], "{$config['avatars']}/$Picturefile");
chmod("{$config['avatars']}/$Picturefile",0666);
}
that should chmod the uploading file