I migrated a Magento 1.9 site locally on my computer. Everything seems to be okay except for the front end filters. None of the filters (color, price, manufacturer) seem to be working. When I click on a filter, it appends the URL with "...?color=xyz" but still all of the products are shown.
No third party applications have been installed. I have reindexed it using n98 magerun.