Index: app/models/issue.rb
===================================================================
--- app/models/issue.rb	(revision 11461)
+++ app/models/issue.rb	(working copy)
@@ -954,7 +954,7 @@
 
   # Returns a string of css classes that apply to the issue
   def css_classes
-    s = "issue status-#{status_id} #{priority.try(:css_classes)}"
+    s = "issue status-#{status_id} #{priority.try(:css_classes)} tracker-#{tracker_id}"
     s << ' closed' if closed?
     s << ' overdue' if overdue?
     s << ' child' if child?