Where is helpers.titles.edit defined?

[Pito Salas]

I am using the twitter-bootstrap-rails gem and experimenting with the 
themed scaffold. Looks great. I have two questions:

1. where is helpers.titles.edit defined? It occurs, for example, here: 

<%- model_class = Program -%>
<div class="page-header">
  <h1><%=t '.title', :default => t('helpers.titles.edit', :model => 
model_class.model_name.human,
                                   :default => "Edit 
#{model_class.model_name.human}") %></h1>
</div>
<%= render :partial => 'form' %>

2. DId anyone else notice that the blue "new" button displays with black 
text on the blue background, ONLY on Safari, but not on Chrome. Is it just 
me or is that a browser dependency?

Thanks!