Error mssg on widget : Warning: Invalid argument supplied for foreach()

This discussion is related to the <Embed> Vanilla addon.

Using Embed Vanilla with forum version 2.0.18.1, WordPress 3.3.1. When I expand the widget in the sidebar I see the following message:

Warning: Invalid argument supplied for foreach() in (hidden for security)/wp-content/plugins/vanilla-forums/widgets.php on line 106.

The widget seems to function properly, but the message could mean decreasing compatibility with newer versions of WordPress. Had QUITE a time trying to get the forum URL to re-validate in the Vanilla Forums plugin admin page.

UnderDog

Figure out what this means:

Warning: Invalid argument supplied for foreach()

and then open /wp-content/plugins/vanilla-forums/widgets.php and search for line 106.