Search widget not working, drops users on home page

Hello,
I can't get the default WordPress search widget to work on my site. What's happening: if I enter "snakes" in the search widget, the URL in the browser bar changes to mysitename.org/?s=snakes and I'm dropped on the home page.

I've been searching all over WordPress forums about this, and most of the threads talk about needing a page template to display the search results. I couldn't find one in the Blogs MU folder. Do I need to create one?