In @projects_controller.rb@, line 297:

    @issues_by_version = {}
    unless @selected_tracker_ids.empty?
      @versions.each do |version|
        issues = version.fixed_issues.visible.find(:all,
                                                   :include => [:project, :status, :tracker, :priority],
                                                   :conditions => {:tracker_id => @selected_tracker_ids, :project_id => project_ids},
                                                   :order => "#{Project.table_name}.lft, #{Tracker.table_name}.position, #{Issue.table_name}.id")
        @issues_by_version[version] = issues
      end
    end
    @versions.reject! {|version| !project_ids.include?(version.project_id) && @issues_by_version[version].empty?}

if @@selected_tracker_ids.empty?@ is @true@, @@issues_by_version@ will always be @{}@ and @@issues_by_version[version].empty?@ yields a @NoMethodError@.

Instead of @empty?@, @blank?@ should be used. Patch is attached.