You have to read the plugin instructions. It says in the FAQ’s that if you have any trouble, to test out the Lite version of the plugin, RS Head Cleaner Lite. With any kind of minification & caching plugin, you have to test, test, test because they won’t be right for every website.
I really wish that you had submitted a support request before writing a review. It’s impossible for me to fix things if people don’t let me know what issues they’re having. If you look at my record of support, you’ll see I respond quickly to every single support request, and have an excellent support record.
When a developer puts so much time into providing free plugins for people, it seems only fair that users would take a mere 5 minutes to submit a support request before posting reviews that say its broken. If a developer is unresponsive, by all means, but I respond to every support request quickly.