Topic: Browsers send AJAX request 3 times

All my browsers (Chrome 15, Firefox 5) sending 3 requests on the one action - button or link click (with remote attribute, of course). Maybe I have a few bindings, but application has just 2 included js files:

    = javascript_include_tag :application
    = javascript_include_tag 'rails'
    = javascript_include_tag 'jqueryui'

Application generated by template … c-cucumber has nothing unusual.
Additional gems (except this … er/Gemfile ):

gem "devise", ">= 1.4.2"
gem "frontend-helpers"
gem "rails-footnotes", ">= 3.7", :group => :development
gem 'thin'
gem 'kaminari'
gem 'formtastic'