Undefined index warning in wp-slimstat-boxes.php on line 383

I recently installed your plugin and I am seeing the following error message in the “Overview” Tab > “Top Traffic Sources” box while running in debug mode:

Notice: Undefined index: domain in /home/../public_html/wp-content/plugins/wp-slimstat/admin/view/wp-slimstat-boxes.php on line 383

As far as I can tell, all other functions are working properly.

My Configuration:
WP ver. 3.5 (Debug mode = true)
domain-mapping.php Ver. 0.5.4.2
WP is installed in the public_html folder
Hosted sites are installed as subdomains (e.g. hostedsite.mydomain.com)

This is a great plugin. Thank you for all of the effort and making it available.

http://wordpress.org/extend/plugins/wp-slimstat/