Index: app/models/issue.rb
===================================================================
--- app/models/issue.rb	(revision 14670)
+++ app/models/issue.rb	(working copy)
@@ -208,6 +208,7 @@
     @spent_hours = nil
     @total_spent_hours = nil
     @total_estimated_hours = nil
+    @attachment_count = nil
     base_reload(*args)
   end
 
@@ -1007,6 +1008,16 @@
     end
   end
 
+  def self.load_attachment_counts(issues)
+    if issues.any?
+      issue_ids = issues.map(&:id)
+      attachment_counts = Attachment.where(:container_type => 'Issue', :container_id => issue_ids).group(:container_id).count
+      issues.each do |issue|
+        issue.instance_variable_set("@attachment_count", attachment_counts[issue.id] || 0)
+      end
+    end
+  end
+
   # Finds an issue relation given its id.
   def find_relation(relation_id)
     IssueRelation.where("issue_to_id = ? OR issue_from_id = ?", id, id).find(relation_id)
@@ -1389,6 +1400,10 @@
     Project.where(condition).having_trackers
   end
 
+  def attachment_count
+    @attachment_count ||= attachments.count
+  end
+
   private
 
   def after_project_change
Index: app/models/issue_query.rb
===================================================================
--- app/models/issue_query.rb	(revision 14675)
+++ app/models/issue_query.rb	(working copy)
@@ -359,6 +359,7 @@
     end
 
     issues = scope.to_a
+    Issue.load_attachment_counts(issues)
 
     if has_column?(:spent_hours)
       Issue.load_visible_spent_hours(issues)
Index: app/views/issues/_list.html.erb
===================================================================
--- app/views/issues/_list.html.erb	(revision 14665)
+++ app/views/issues/_list.html.erb	(working copy)
@@ -27,7 +27,7 @@
       </td>
     </tr>
   <% end %>
-  <tr id="issue-<%= issue.id %>" class="hascontextmenu <%= cycle('odd', 'even') %> <%= issue.css_classes %> <%= level > 0 ? "idnt idnt-#{level}" : nil %>">
+  <tr id="issue-<%= issue.id %>" class="hascontextmenu <%= cycle('odd', 'even') %> <%= issue.css_classes %> <%= "has_attachments" if issue.attachment_count > 0 %> <%= level > 0 ? "idnt idnt-#{level}" : nil %>">
     <td class="checkbox hide-when-print"><%= check_box_tag("ids[]", issue.id, false, :id => nil) %></td>
     <%= raw query.inline_columns.map {|column| "<td class=\"#{column.css_classes}\">#{column_content(column, issue)}</td>"}.join %>
   </tr>
Index: public/stylesheets/application.css
===================================================================
--- public/stylesheets/application.css	(revision 14665)
+++ public/stylesheets/application.css	(working copy)
@@ -171,6 +171,9 @@
 tr.issue.idnt-8 td.subject {padding-left: 11em;}
 tr.issue.idnt-9 td.subject {padding-left: 12.5em;}
 
+tr.issue td.id {padding-left: 16px;}
+tr.issue.has_attachments td.id {background: url(../images/attachment.png) no-repeat 0 3px;}
+
 table.issue-report {table-layout:fixed;}
 
 tr.entry { border: 1px solid #f8f8f8; }