Redmine

I have been trying to install the 'Issue Closed Date' plugin (http://www.redmine.org/plugins/closed_date), but seem to be having problems getting it to work with Redmine v1.1.2.

After installation, when clicking on the 'Issues' tab for a specific project I receive the following error:

NoMethodError in Issues#index

Showing app/views/queries/_filters.rhtml where line #75 raised:

undefined method `[]' for :date:Symbol

Extracted source (around line #75):

72: <tr>
73: <td>
74: <table>
75: <% query.available_filters.sort{|a,b| a[1][:order]<=>b[1][:order]}.each do |filter| %>
76:     <% field = filter[0]
77:        options = filter[1] %>
78:     <tr <%= 'style="display:none;"' unless query.has_filter?(field) %> id="tr_<%= field %>" class="filter">

Trace of template inclusion: app/views/issues/index.rhtml

Any ideas? I've posted the same problem on the author's github issue list, but so far have received no response.