The simpler media website CMS
I found a problem using bxslider_thumb_nav extension on a mobile device
links do not work.
Workaround at bottom of this page does not work for me.
I did try to replace slider.viewport.on by slider.viewport.bind and got same problem, so, I reverted to your code ! (line 1085 of jquery.bxslider.js)
I tried to set (line 35) touchEnabled: true,