Hi,
when I use form varibles, named, as associative array (see an example) and form have attribute multipart/form-data, after posting, first element of posted array are lost, in some cases.

Example:
---------------------------------------------------------
<form name="article" method="POST" action="save_article" enctype="multipart/form-data">
<input type="hidden" name="MAX_FILE_SIZE" value="10000000">

<input type="file" name="img[name]" value="./myfile.jpg">
<input type="hidden" name="img[koeff]" value="1.45">
<input type="hidden" name="img[min_width]" value="220">
----------------------------------------------------------

After posting printr($img) give:

Array
(
    [koeff] => 1.45
    [min_width] => 220
)

Thank you for support.
Ivaschenko Yuriy.