Hi Drew
Its certainly strange whats happening, possibly another plugin, or some scripts that aid in compatibility with older versions of IE?
The first bit of html Search & Filter outputs is the opening <form>
tag – so I’m fairly sure if there is an erronous <p>
being added that its not by S&F.
I guess its possibly some html tags in your document are not closed properly and causing inconsistent behaviour across browsers (in this case just IE9). Have you run your html through a validator? What happens when you actually view the source of the page rather than DOM inspect, on both IE9 and a modern browser?
Hope that helps