Hi - I have been using this plugin for a while and loving it. When WP went above 3 the plugin didn't seem to be caching pages as well. My cached page count went from many that changed all of the time and now it only ever reads 6. I completely uninstalled the plugin and then added it again and reactivated but still only max out to 6 pages cached. The blog receives over 3.5K unique visits a day so there is no way it is only caching 6 pages at a time.