Index: wp-admin/custom-header.php
===================================================================
--- wp-admin/custom-header.php	(revision 14575)
+++ wp-admin/custom-header.php	(working copy)
@@ -416,7 +416,7 @@
 <div class="wrap">
 <h3><?php _e('Upload New Header Image'); ?></h3><p><?php _e('Here you can upload a custom header image to be shown at the top of your site instead of the default one. On the next screen you will be able to crop the image.'); ?> <?php printf(__('Images of exactly <strong>%1$d x %2$d pixels</strong> will be used as-is.'), HEADER_IMAGE_WIDTH, HEADER_IMAGE_HEIGHT); ?></p>
 
-<form enctype="multipart/form-data" id="uploadForm" method="POST" action="<?php echo esc_attr(add_query_arg('step', 2)) ?>">
+<form enctype="multipart/form-data" id="uploadForm" method="post" action="<?php echo esc_attr(add_query_arg('step', 2)) ?>">
 <label for="upload"><?php _e('Choose an image from your computer:'); ?></label><br /><input type="file" id="upload" name="import" />
 <input type="hidden" name="action" value="save" />
 <?php wp_nonce_field('custom-header') ?>
@@ -507,7 +507,7 @@
 
 <div class="wrap">
 
-<form method="POST" action="<?php echo esc_attr(add_query_arg('step', 3)) ?>">
+<form method="post" action="<?php echo esc_attr(add_query_arg('step', 3)) ?>">
 
 <p><?php _e('Choose the part of the image you want to use as your header.'); ?></p>
 <div id="testWrap" style="position: relative">