title: Upgrading bootstrap-sass to 3.3.4 causes loss of glyphicons in bootstrap with Rails. Why?
body: <p>Rails 4.2 and boostrap-sass 3.3.4</p>
  
  <p>Everything was working fine in 3.3.3, but after upgrading to 3.3.4, I get 403 forbidden errors when my site tries to access bootstrap's glyphicons fonts.  How do I fix?</p>
  
  <p>My app/assets/stylesheets/application.scss file:</p>
  
  <pre><code>$link-color: #00673E;
  $brand-primary: #00673E;
  @import '*';
  @import 'jquery-ui/datepicker';
  @import "bootstrap-sprockets";
  @import "bootstrap";
  </code></pre>
  
  <p>In the Gemfile:</p>
  
  <pre><code>gem 'sass-rails', '&gt;= 3.2' #upgrading to 5 makes no difference
  gem 'bootstrap-sass', '3.3.4'
  </code></pre>