Thanks for responding, Kellog :-) I think you're leading me on the right track...
In fact I first installed Hyper Cache (had forgotten about it not working on multisite install). Then I uninstalled it and installed Quick Cache instead.
Obviously, Hyper Cache didn't uninstall properly. I just checked after reading your reply and found a Hyper Cache folder in my cach directory.
And to answer to you, yes, I have a /wp-content/advanced-cache.php file
So I tried to follow your advices:
- I just deleted the remaining Hyper Cache folder from my cach directory
- I disabled Quick Cache (I even desactivated the plugin) and deleted the /wp-content/advanced-cache.php file
- Then I reactivated Quick Cache and enabled it
- Then I logged out from my site and cleared my browser cache (I even closed then restarted my browser).
When viewing the source of my site, obviously, Quick Cache is still not working.
The only difference from what you described is that I didn't enabled the other cache plugin (Hyper cache in my case) before deleting the advanced-cache.php, since it was not even in my plugin list anymore.
Should I do that ? I mean, should I desactivate Quick Cache and reinstall Hyper Cache in order to properly delete (?) the advanced-cache.php ???
I hope you'll stick with me, Kellog :-)
P.S. In case it helps here's my website --> http://fr.yoga-laurence-lhermitte.be/