[Steven Zahm]

@ Mark

The theme, most likely, or another plugin is using some sort of JavaScript “shim” to enable the HTML 5 placeholder value for the search input which IE9 doesn’t support natively the other browsers do. This is causing it the term “Search” to be submitted when you select a category.

Hmmm, the only thing I can think of is if you grant me a temp admin account I can remove the “Search” placeholder from the Connections plugin files.