This may help other people using Google CSE that want to automatically insert the ‘more:’ subsection queries for the user. The problem was that Firefox is sending a GET parameter (’sa’) that IE doesn’t send when a query is entered and you hit return. IE sends it when you click on the Search button, though. As part of my strategy to keep anything illegitimate from getting past Apache httpd into the application server, I was checking for necessary parameters and rejecting anything without them. So the conclusion is that ’sa’ is not a necessary GET parameter.