Please fix i18n with this patch.

Hello,
I’ve ran into problems with WP 3.5 and your plugin on a Windows-based server – the plugin was not able to load localization files properly.

It would be great if you replace

load_plugin_textdomain('sblogin', WP_PLUGIN_URL.'/sidebar-login/langs/', 'sidebar-login/langs/');

with

add_action( 'plugins_loaded', 'sblogin_load_textdomain' );

function sblogin_load_textdomain() {
	$plugin_dir = dirname( plugin_basename( __FILE__ ) );
	load_plugin_textdomain( 'sblogin', false, $plugin_dir.'/langs' );
}

in next version.

https://www.ads-software.com/extend/plugins/sidebar-login/