I was having the same problem – supercache directory was empty – no cached files.
Then, I read somewhere that you’ll only see normal cache files when logged in or if you left a comment. So, I logged out (I was using Firefox). Still only normal cache pages.
But, then I tried going to my site through my iphone browser. Viola! I started getting supercache files generated and served. Also, I opened a different browser (Safari), went to my site and got super cache pages.
So empty supercache directories when logged in is a feature! lol.
Donncha, you wrote awesome plug-in. My site is blazing fast. Thanks.
