I've been using W3 Total Cache on my bangla site http://www.androidkothon.com and I'm facing issues where emptying cache is not really working. The problem is triggered by enabling mobile theme module on Jetpack.
Problem with Jetpack: I use WordPress.com's Jetpack for a number of reasons. Weeks ago, I activated its mobile theme module to see how my site would look on a mobile device. Dissatisfied, I deactivated the module. But to my amazement, the mobile theme was showing up on computers. I deleted/purged cache and made sure that the mobile theme module was deactivated. But I didn't have any luck.
Even today when I accessed http://www.androidkothon.com from a friend's computer, the mobile theme showed up despite the fact that it's actually deactivated, caches cleared and it was a computer, not a mobile. Screen: http://d.pr/i/GhXP
I'm pretty much sure it has everything to do with W3 Total Cache plugin. But posting over there ( http://wordpress.org/support/topic/serious-complication-with-jetpackmaintenance-mode?replies=1 ) didn't help. Now that the problem also includes Jetpack, I'm posting the issue here. Can anyone tell me how to get rid of this serious problem?