Redmine

I've got a strange problem. There's an issue in the project I'm working on that I cannot open. I can open any other issue and the other people on the project can open this issue just fine. I tried having someone update the issue, which worked, but I still cannot open it.

About your application's environment
Ruby version              1.8.6 (i686-linux)
RubyGems version          1.3.2
Rack version              1.0
Rails version             2.3.5
Active Record version     2.3.5
Active Resource version   2.3.5
Action Mailer version     2.3.5
Active Support version    2.3.5
Application root          /var/www/redmine/redmine-1.0.1
Environment               development
Database adapter          mysql
Database schema version   20100819172912

About your Redmine plugins
Issue Importer                       0.3.1
Redmine System Notification plugin   0.2.0
Redmine Graphs plugin                0.1.0

Here is the log when I try pulling this issue up:

Processing IssuesController#show (for xx.xx.xx.xx at 2012-03-16 12:30:24) [GET]
  Parameters: {"action"=>"show", "id"=>"14535", "controller"=>"issues"}
Rendering template within layouts/base
Rendering issues/show.rhtml

ActionView::TemplateError (undefined method `position' for nil:NilClass) on line #16 of app/views/issues/_history.rhtml:
13:       <% end %>
14:     </ul>
15:     <% end %>
16:     <%= render_notes(issue, journal, :reply_links => reply_links) unless journal.notes.blank? %>
17:   </div>
18:   <%= call_hook(:view_issues_history_journal_bottom, { :journal => journal }) %>
19: <% end %>

    app/models/issue.rb:476:in `css_classes'
    app/helpers/application_helper.rb:600:in `parse_redmine_links'
    app/helpers/application_helper.rb:584:in `gsub!'
    app/helpers/application_helper.rb:584:in `parse_redmine_links'
    app/helpers/application_helper.rb:455:in `send'
    app/helpers/application_helper.rb:455:in `textilizable'
    app/helpers/application_helper.rb:454:in `each'
    app/helpers/application_helper.rb:454:in `textilizable'
    app/helpers/application_helper.rb:468:in `parse_non_pre_blocks'
    app/helpers/application_helper.rb:453:in `textilizable'
    app/helpers/journals_helper.rb:32:in `render_notes'
    app/views/issues/_history.rhtml:16:in `_run_rhtml_app47views47issues47_history46rhtml_locals_history_issue_journals_object'
    app/views/issues/_history.rhtml:2:in `each'
    app/views/issues/_history.rhtml:2:in `_run_rhtml_app47views47issues47_history46rhtml_locals_history_issue_journals_object'
    app/views/issues/show.rhtml:92:in `_run_rhtml_app47views47issues47show46rhtml'
    app/controllers/issues_controller.rb:124:in `show'
    app/controllers/issues_controller.rb:123:in `show'

Rendering /var/www/redmine/redmine-1.0.1/public/500.html (500 Internal Server Error)

I'm not highly linux/ruby/etc... savvy so speak slowly.

Thanks for looking.