Sadly w3-total-cache version 0.8.5.2 breaks Contact Form 7: http://contactform7.com/
None of the ajax in Contact Form 7 works after installing w3-total-cache. This is with the latest version of w3-total-cache.
Even if I disable all the options in w3-total-cache, the contact page ajax is broken.
If I disable the w3-total-cache plugin itself then no more problem.
This bug was introduced in w3-total-cache version 0.8.5
I know this because I have reinstalled w3-total-cache version 0.8 which works fine with Contact Form 7.
Please fix this bug. I really would love to use the latest w3-total-cache version.