This tag with rails 3

<%= link_to 'Destroy', item, :method => :delete,:confirm=>'Are you sure?' %>

produces this html

<a href="/news/3" data-confirm="Are you sure?" data-method="delete" rel="nofollow">Destroy</a>

The entry is deleted, the problem is that the popup appears twice.

What could be causing this?

ruby-on-rails
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