I downloaded your toolbox, and it seems to be working okay. It's very nice and handy.
When I looked at the output for varinfo though, the following warning is printed a few times:
Warning: htmlspecialchars() expects parameter 1 to be string, array given in /var/www/html/admin/toolbox/varinfo.php on line 79
Do you know if this is preventing some variables from being displayed?
It's nice to see you all decided to consolidate your plugin downloads here.