First thanks for this great little rig. Like the Responsive + touch + plugin.
Just a headsup:
Got your 22/04 version and had a problem with nav button support in FF Win, where clicking the arrows had no effect.
Found it a known problem and was addressed with a new jquery.flexslider-min.js version on Git issues 958.
Manually added the new js to your plugin fodlers and things are working as expected now.