Index: wp-admin/includes/class-wp-upgrader.php
===================================================================
--- wp-admin/includes/class-wp-upgrader.php	(revision 11008)
+++ wp-admin/includes/class-wp-upgrader.php	(working copy)
@@ -54,7 +54,7 @@
 	function fs_connect( $directories = array() ) {
 		global $wp_filesystem;
 	
-		if ( false === ($credentials = $this->skin->request_filesystem_credentials()) ) //request_filesystem_credentials($url)) )
+		if ( false === ($credentials = $this->skin->request_filesystem_credentials()) )
 			return false;
 	
 		if ( ! WP_Filesystem($credentials) ) {
@@ -258,9 +258,6 @@
 		$options = wp_parse_args($options, $defaults);
 		extract($options);
 
-		$this->skin->header();
-		$this->skin->before();
-		
 		//Connect to the Filesystem first.
 		$res = $this->fs_connect( array(WP_CONTENT_DIR, $destination) );
 		if ( ! $res ) //Mainly for non-connected filesystem.
@@ -270,7 +267,10 @@
 			$this->skin->error($res);
 			return $res;
 		}
-		
+
+		$this->skin->header();
+		$this->skin->before();
+
 		//Download the package (Note, This just returns the filename of the file if the package is a local file)
 		$download = $this->download_package( $package );
 		if ( is_wp_error($download) ) {
Index: wp-admin/update.php
===================================================================
--- wp-admin/update.php	(revision 11008)
+++ wp-admin/update.php	(working copy)
@@ -77,11 +77,7 @@
 	
 		$title = sprintf( __('Installing Plugin: %s'), $api->name . ' ' . $api->version );
 		$nonce = 'install-plugin_' . $plugin;
-		$url = add_query_arg( array(
-								'plugin' => $plugin,
-								'plugin_name' => $api->name . ' ' . $api->version,
-								'download_url' => $api->download_link
-							), 'update.php?action=install-plugin');
+		$url = 'update.php?action=install-plugin&plugin=' . $plugin;
 		$type = 'web'; //Install plugin type, From Web or an Upload.
 
 		$upgrader = new Plugin_Upgrader( new Plugin_Installer_Skin( compact('title', 'url', 'nonce', 'plugin', 'api') ) );
@@ -157,11 +153,7 @@
 	
 		$title = sprintf( __('Installing theme: %s'), $api->name . ' ' . $api->version );
 		$nonce = 'install-theme_' . $theme;
-		$url = add_query_arg( array(
-								'theme' => $theme,
-								'theme_name' => $api->name . ' ' . $api->version,
-								'download_url' => $api->download_link
-							), 'update.php?action=install-theme');
+		$url = 'update.php?action=install-theme&theme=' . $theme;
 		$type = 'web'; //Install theme type, From Web or an Upload.
 	
 		$upgrader = new Theme_Upgrader( new Theme_Installer_Skin( compact('title', 'url', 'nonce', 'plugin', 'api') ) );