Applied a patch to fix the POST validity issues.

patches/lowercase_post.diff

+Index: views/default/input/form.php
+===================================================================
+--- views/default/input/form.php	(revision 3440)
++++ views/default/input/form.php	(working copy)
+@@ -10,7 +10,7 @@
+ 	 * @link http://elgg.org/
+ 	 * 
+ 	 * @uses $vars['body'] The body of the form (made up of other input/xxx views and html
+-	 * @uses $vars['method'] Method (default POST)
++	 * @uses $vars['method'] Method (default post)
+ 	 * @uses $vars['enctype'] How the form is encoded, default blank
+ 	 * @uses $vars['action'] URL of the action being called
+ 	 * 
+@@ -21,7 +21,7 @@
+ 	$body = $vars['body'];
+ 	$action = $vars['action'];
+ 	if (isset($vars['enctype'])) { $enctype = $vars['enctype']; } else { $enctype = ''; }
+-	if (isset($vars['method'])) { $method = $vars['method']; } else { $method = 'POST'; }
++	if (isset($vars['method'])) { $method = $vars['method']; } else { $method = 'post'; }
+ 
+ 	// Generate a security header
+ 	$security_header = "";
+Index: views/failsafe/input/form.php
+===================================================================
+--- views/failsafe/input/form.php	(revision 3440)
++++ views/failsafe/input/form.php	(working copy)
+@@ -10,7 +10,7 @@
+ 	 * @link http://elgg.org/
+ 	 * 
+ 	 * @uses $vars['body'] The body of the form (made up of other input/xxx views and html
+-	 * @uses $vars['method'] Method (default POST)
++	 * @uses $vars['method'] Method (default post)
+ 	 * @uses $vars['enctype'] How the form is encoded, default blank
+ 	 * @uses $vars['action'] URL of the action being called
+ 	 * 
+@@ -21,7 +21,7 @@
+ 	$body = $vars['body'];
+ 	$action = $vars['action'];
+ 	if (isset($vars['enctype'])) { $enctype = $vars['enctype']; } else { $enctype = ''; }
+-	if (isset($vars['method'])) { $method = $vars['method']; } else { $method = 'POST'; }
++	if (isset($vars['method'])) { $method = $vars['method']; } else { $method = 'post'; }
+ 
+ ?>
+ <form <?php if ($id) { ?>id="<?php echo $id; ?>" <?php } ?> <?php if ($name) { ?>name="<?php echo $name; ?>" <?php } ?> action="<?php echo $action; ?>" method="<?php echo $method; ?>" <?php if ($enctype!="") echo "enctype=\"$enctype\""; ?>>
+Index: views/failsafe/messages/sanitisation/settings.php
+===================================================================
+--- views/failsafe/messages/sanitisation/settings.php	(revision 3440)
++++ views/failsafe/messages/sanitisation/settings.php	(working copy)
+@@ -26,7 +26,7 @@
+ ?>
+ <div>
+ 	<h2><?php echo elgg_echo('installation:settings:dbwizard:prompt'); ?></h2>
+-	<form method="POST">
++	<form method="post">
+ 		<table cellpadding="0" cellspacing="10" style="background:#f1f1f1;">
+ 			<tr><td valign="top"><?php echo elgg_echo('installation:settings:dbwizard:label:user'); ?></td><td valign="top"> <input type="text" name="db_install_vars[CONFIG_DBUSER]" /></td></tr>
+ 			<tr><td valign="top"><?php echo elgg_echo('installation:settings:dbwizard:label:pass'); ?></td><td valign="top"> <input type="password" name="db_install_vars[CONFIG_DBPASS]" /></td></tr>