Sidebar Widgets Plugin - Adsense - Enabling Sending Referrers Problem

[Bloggeries]

Revision 26864: /widgets/trunk

Sidebar Widgets 1.0 Adds “Sidebar Widgets” panel under Presentation menu By Automattic, Inc..
When I add my adsense code into one of the text boxes I get the error below.

Sorry, you need to enable sending referrers for this feature to work.

When you click the link it warns you... So basically should I enable it or...

Anyone with any insight it would be greatly appreciated. I want to add adsense to the blog reviews as I get lot's of super targeted niche search engine traffic for the different niches the blog reviews are in. If the blog review isn't what they are looking for I'd love to offer my visitors an alternative

Thanks in Advance,