I’ve managed to get it working, here’s how:
Change ‘Use mod_rewrite to serve cache files. (Recommended)’ to ‘Use PHP to serve cache files.’
Edit your .htaccess file and remove the WPSuperCache entry:
# BEGIN WPSuperCache
delete everything
# END WPSuperCache
Go back to WP Super Cache Settings and reconfigure/enable your Preload settings and click on ‘Preload Cache Now’.
It should then work correctly, it did for me 🙂
I also enabled the ‘Use mod_rewrite to serve cache files. (Recommended)’ again and it’s still okay. My guess is that there was something wrong with the .htaccess configuration.
I’m also seeing the same.
I’ve set the ‘Refresh preloaded cache files every’ to 1440 minutes and yet it refreshes every 50 minutes or so.
Has anybody tried to uninstall/reinstall the plugin?