I use the WP Social Blogroll [http://wordpress.org/extend/plugins/feed-reading-blogroll/] to create a widget which fetches the latest updates of blogs to which I subscribe. The plugin uses Google's AJAX Feed API to do so.
When "Use Google Libraries" is enabled, the WP Social Blogroll appears to no longer function (i.e., updates are no longer retrieved from other blogs).
Any thoughts? Thank you!