Max Array Size in Post?

I have a database driven music web site that allows the admin to create photo galleries. The photos and captions are entered using a form which allows the admin to upload a small and large photo. The number of photos is requested in a form that calls this entry form. The code looks like this: for($a=1;$a<$requestCount+1;$a++){ ?> <tr> <td align=right> PhotoBig #<?echo"$a"?>: </td> <td> <input type=file name=userfile[]> </td> </tr> <tr> <td align=right> PhotoSmall #<?echo"$a"?>: </td> <td> <input type=file name=userfile[]> </td> </tr> <tr> <td align=right> Caption #<?echo"$a"?>: </td> <td> <input type = text name = NewCaption<?echo"$a"?>> </td> </tr> <? } The problem is, there seems to be a maximum of 12 small and 12 large photos. If I change to only large photos, the maximum becomes 25, which leads me to believe that php puts a limit on the size an array from a form can be. The error displayed comes from apache (internal server error) and in the apache error log, I get the "premature end of script headers php.exe" message which of course is no help. Does anyone know of a setting in Apache or php to fix this? Thanks