[Plugin: Google Analytics for WordPress] Error: Undefined Index: manual_uastring

WordPress: 3.4.1
GA by Yoast: 4.2.4

Notice: Undefined index: manual_uastring in ./wp-content/plugins/google-analytics-for-wordpress/googleanalytics.php on line 430

—
Fresh WordPress install. Installed plugin, no configurations made yet. Harmless error? Probably. Just thought you should know about it.

http://wordpress.org/extend/plugins/google-analytics-for-wordpress/