W3 total cache login problems is what i experienced when Using Google Chrome, You see the login form after when you tried to login.
i tried everything until i discovered this plugin. I am glad to say, this plugin solved 100% my problem.
Thank you so much.
=== UPDATE === December the 21st ===
Suddenly my website wasn't loading anymore. By deactivated THIS plugin my site was back online. So i have to say don't install this plugin until this problem has been resolved.