I have a fresh install of 3.2 and am having some trouble.
I've indexed the site, created category search filters and set the modules to use the appropriate filter for each section of my site. So far, so good, and it's working fine provided that the module is set to display the advanced search features. The problem is I don't want to display the filter dropdown to the user, so I toggled the advanced search features to 'hide' and the filter does not seem to be respected anymore. The search returns results from all categories.