I just installed WP Super Cache, and suddenly nothing I did on the back end worked. Whatever I did, like create a post, after clicking submit, it suddenly went to a different post on the front end. Going back to admin, the post was there. I tried deleting it, got thrown back to the front end again. Went back to check, it had not been deleted.
Same for other things I tried to do while in admin - I'd suddenly find myself on the front end, and the thing I tried to do did not take.
I couldn't even log out - it would just throw me to the front end, and I'd still be logged in.
For settings, I had the Mod_Rewrite on, Don’t cache pages for known users on, and Preload on.
Deactivated the plugin for now. Anyone have any clues?