Redmine

There is ability to add a comment to the news. And 500 Internal Server Error is rendered if adds an empty comment.
I'm using

• Redmine 0.8.4.devel.2815
• PostgreSQL 8.0.15
• Ruby 1.8.6 (2009-03-31 patchlevel 368) [i486-linux]
• Rails 2.2.2

ActionView::TemplateError (undefined method `any?' for nil:NilClass) on line #45 of app/views/news/show.rhtml:
42:     </div>
43:     <h4><%= authoring comment.created_on, comment.author %></h4>
44:     <%= textilizable(comment.comments) %>
45: <% end if @comments.any? %>
46: </div>
47:
48: <% if authorize_for 'news', 'add_comment' %>

    app/views/news/show.rhtml:45
    /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view/renderable.rb:39:in `send'
    /usr/lib/ruby/gems/1.8/gems/actionpack-2.2.2/lib/action_view
....