Automatic upgrade of Administrative Console Skin failed. You can verify patching log errors below.

<?php
			$output = unserialize( $this->Application->RecallVar('SkinUpgradeLog') );

			foreach ($output as $version => $version_output) {
				$sub_header = 'Patching to ' . $version . ' version:';
				echo $sub_header . "\n" . str_repeat('=', strlen($sub_header)) . "\n";
				echo $version_output . "\n";
			}
		?>

You must manually merge skin, created during upgrade with your current primary skin to ensure, that Administrative Console interface isn't broken.