Google Analytics reports that most of the search engine traffic to my site goes to a page that is simply shown as "/" in the GA report (without quotes, of course).

Here's how it looks: 2011-10-04_2226 - Niichehunter's library

I don't know if this can be considered a URL but it surely doesn't look like one.

Is this something to worry about? Why is this occurring on the site in the first place? What is causing this?

If this has negative SEO consequences, how should this be resolved?

Hope to hear your opinions on this. Thanks!