diff -ur redmine-1.1.0/app/controllers/repositories_controller.rb redmine-1.1.0-revision-update/app/controllers/repositories_controller.rb
--- redmine-1.1.0/app/controllers/repositories_controller.rb	2011-01-09 17:05:00.000000000 -0700
+++ redmine-1.1.0-revision-update/app/controllers/repositories_controller.rb	2011-03-22 12:01:56.115467800 -0600
@@ -150,6 +150,37 @@
     show_error_not_found
   end
   
+  def update #revision
+    @changeset = @repository.find_changeset_by_name(@rev)
+    raise ChangesetNotFound unless @changeset
+
+    # update revision properties from repository
+    revision = @repository.scm.revision(@rev)
+    @changeset.committer = revision.author
+    @changeset.committed_on = revision.time
+    @changeset.comments = revision.message
+    
+    # report success or errors
+    if @changeset.save
+      flash[:notice] = l(:notice_successful_update)
+      # on success, rescan new comments for related issue ids
+      @changeset.scan_comment_for_issue_ids
+    else
+      # can't seem to bring in the helper method 'error_messages_for'
+      # and injecting it into show.rhtml doesn't seem to work, since 
+      # the @changeset loses the errors on redirect (due to changeset reload)
+      flash[:error] = "<ul>" + @changeset.errors.full_messages.map {|msg| "<li>" + ERB::Util.html_escape(msg) + "</li>"}.join + "</ul>"
+    end
+   
+    respond_to do |format|
+      format.html { redirect_to :action => 'revision', :id => @project, :rev => @rev }
+      format.api  { render_validation_errors(@changeset) }
+    end
+    
+  rescue ChangesetNotFound
+    show_error_not_found
+  end
+  
   def diff
     if params[:format] == 'diff'
       @diff = @repository.diff(@path, @rev, @rev_to)
diff -ur redmine-1.1.0/app/models/changeset.rb redmine-1.1.0-revision-update/app/models/changeset.rb
--- redmine-1.1.0/app/models/changeset.rb	2011-01-09 17:05:00.000000000 -0700
+++ redmine-1.1.0-revision-update/app/models/changeset.rb	2011-03-22 12:03:22.319144500 -0600
@@ -125,8 +125,11 @@
         issue, hours = find_referenced_issue_by_id(m[0].to_i), m[2]
         if issue
           referenced_issues << issue
-          fix_issue(issue) if fix_keywords.include?(action.to_s.downcase)
-          log_time(issue, hours) if hours && Setting.commit_logtime_enabled?
+          # don't update the issue if a relation already exists
+          if !self.issues.include?(issue)
+            fix_issue(issue) if fix_keywords.include?(action.to_s.downcase)
+            log_time(issue, hours) if hours && Setting.commit_logtime_enabled?
+          end
         end
       end
     end
diff -ur redmine-1.1.0/app/views/repositories/revision.rhtml redmine-1.1.0-revision-update/app/views/repositories/revision.rhtml
--- redmine-1.1.0/app/views/repositories/revision.rhtml	2011-01-09 17:05:00.000000000 -0700
+++ redmine-1.1.0-revision-update/app/views/repositories/revision.rhtml	2011-03-22 12:01:56.146718000 -0600
@@ -19,7 +19,10 @@
   <% end %>
 </div>
 
-<h2><%= l(:label_revision) %> <%= format_revision(@changeset) %></h2>
+<h2>
+  <%= l(:label_revision) %> <%= format_revision(@changeset) %>
+  <%= link_to(image_tag('reload.png'), {:controller => 'repositories', :action => 'update', :id => @project, :rev => @rev}, :method => :get, :title => l(:button_update)) %>
+</h2>
 
 <p><% if @changeset.scmid %>ID: <%= @changeset.scmid %><br /><% end %>
 <span class="author"><%= authoring(@changeset.committed_on, @changeset.author) %></span></p>
@@ -45,7 +48,7 @@
 <li class="change change-D"><%= l(:label_deleted) %></li>
 </ul>
 
-<p><%= link_to(l(:label_view_diff), :action => 'diff', :id => @project, :path => "", :rev => @changeset.identifier) if @changeset.changes.any? %></p>
+<p><%= link_to(l(:label_view_diff), :action => 'diff', :id => @project, :path => "", :rev => @rev) if @changeset.changes.any? %></p>
 
 <div class="changeset-changes">
 <%= render_changeset_changes %>
diff -ur redmine-1.1.0/lib/redmine/scm/adapters/abstract_adapter.rb redmine-1.1.0-revision-update/lib/redmine/scm/adapters/abstract_adapter.rb
--- redmine-1.1.0/lib/redmine/scm/adapters/abstract_adapter.rb	2011-01-09 17:05:00.000000000 -0700
+++ redmine-1.1.0-revision-update/lib/redmine/scm/adapters/abstract_adapter.rb	2011-03-22 12:01:56.146718000 -0600
@@ -117,6 +117,12 @@
           return nil
         end
     
+        def revision(identifier)
+          revisions = revisions(nil, identifier, identifier, {})
+          return nil unless revisions
+          return revisions.first
+        end
+        
         def revisions(path=nil, identifier_from=nil, identifier_to=nil, options={})
           return nil
         end
diff -ur redmine-1.1.0/lib/redmine.rb redmine-1.1.0-revision-update/lib/redmine.rb
--- redmine-1.1.0/lib/redmine.rb	2011-02-11 17:24:46.508692400 -0700
+++ redmine-1.1.0-revision-update/lib/redmine.rb	2011-03-22 12:01:56.162343100 -0600
@@ -120,7 +120,7 @@
   end
     
   map.project_module :repository do |map|
-    map.permission :manage_repository, {:repositories => [:edit, :committers, :destroy]}, :require => :member
+    map.permission :manage_repository, {:repositories => [:edit, :committers, :destroy, :update]}, :require => :member
     map.permission :browse_repository, :repositories => [:show, :browse, :entry, :annotate, :changes, :diff, :stats, :graph]
     map.permission :view_changesets, :repositories => [:show, :revisions, :revision]
     map.permission :commit_access, {}