@ioloman
I noticed this too. The plugin was messing with the admin page on the site that I was building but I managed to fix it.
Delete the pngfix folder (from inside the js folder.)
Open/Edit wp-sliding-login-dashboard-panel.php and delete line number 20:
$wp_sliding_login_pngfix_js_path = $wp_sliding_login_plugin_url_path. ‘/js/pngfix/supersleight-min.js’;
WordPress can only have one jquery library installed.
Funny thing is, as far as I could tell, this only affected IE.
