wellenmacher on "upload size limit (contact form) although php.ini looks fine"

Hi,

I'm using Contact Form 7 Plugin on several websites and there is an upload size limit of about 1.5M. Same thing on localhost. I checked my PHP.ini files an they look fine.

- upload_max_filesize: 32M
- post_max_size: 32M
- max_execution_time: 360
- memory_limit : 32M

I found this thread: http://wordpress.org/support/topic/wp-limits-uploads-although-settings-in-phpini-state-otherwise and checked this function. the 3.6 version has a different function, but I'm not the expert and what I tried didnt work.

wp-admin/includes/ms.php

function check_upload_size( $file ) {
	if ( get_site_option( 'upload_space_check_disabled' ) )
		return $file;

	if ( $file['error'] != '0' ) // there's already an error
		return $file;

	if ( defined( 'WP_IMPORTING' ) )
		return $file;

	$space_left = get_upload_space_available();

	$file_size = filesize( $file['tmp_name'] );
	if ( $space_left < $file_size )
		$file['error'] = sprintf( __( 'Not enough space to upload. %1$s KB needed.' ), number_format( ($file_size - $space_left) /1024 ) );
	if ( $file_size > ( 1024 * get_site_option( 'fileupload_maxk', 1500 ) ) )
		$file['error'] = sprintf(__('This file is too big. Files must be less than %1$s KB in size.'), get_site_option( 'fileupload_maxk', 1500 ) );
	if ( upload_is_user_over_quota( false ) ) {
		$file['error'] = __( 'You have used your space quota. Please delete files before uploading.' );
	}
	if ( $file['error'] != '0' && !isset($_POST['html-upload']) )
		wp_die( $file['error'] . ' <a href="history.go(-1)">' . __( 'Back' ) . '</a>' );

	return $file;
}

Tried to play a bit with the numbers, but still same problem. Think, that has nothing to do with the frontend upload!?

Can anyone help me with that?

Best
John