This post is still getting a little traffic which means people are still using this plugin. I strongly suggest getting away from using a mobile responsive plugin like WPtouch and start using a 100% mobile responsive theme. I have been using the Avada Theme for the past two years on all of my sites and it is the best theme I have ever used.
You can build any type of Web site with this theme and it comes with a drag and drop page builder than ANYONE can use. My 8-year old daughter has started a Web site and she uses it with ease.
It does it all and best of all, it is 100% mobile responsive which is important. When I say 100% mobile responsive, what I mean is that some theme authors call their themes mobile responsive but certain aspects of the them aren’t such as pictures, tables, etc.. This one is and it is the #1 WordPress selling theme of all time. Give it a shot! You can learn more about it by clicking the link below.
Here is a great tutorial on how to fix the WordPress Plugin, WPtouch so that it can work with W3 Total Cache plugin.
After installing and enabling W3 Total Cache:
1. Go to the Page Cache settings under the Performance tab
-Scroll down to the Rejected user agents box and paste the WPtouch default user agents (found below). Save changes
2. Go to the Minify settings page under the Performance tab
-Scroll down to the Rejected user agents box and enter the WPtouch default user agents. Save changes
3. Go to the CDN settings page under the Performance tab
-Scroll down to the Rejected user agents box and again enter the WPtouch default user agents. Save Changes
4. Finally, go to the General Settings page under the Performance tab and click empty all caches.
Your blog should now be configured correctly to work with WPtouch and W3 Total Cache correctly.
Add one user agent per line.