diff -Naur original/activerecord/lib/active_record/associations/has_many_through_association.rb new/activerecord/lib/active_record/associations/has_many_through_association.rb
--- original/activerecord/lib/active_record/associations/has_many_through_association.rb	2008-10-03 17:09:15.000000000 +0530
+++ new/activerecord/lib/active_record/associations/has_many_through_association.rb	2008-10-03 17:08:11.000000000 +0530
@@ -158,9 +158,9 @@
           end
 
           "INNER JOIN %s ON %s.%s = %s.%s %s #{@reflection.options[:joins]} #{custom_joins}" % [
-            @reflection.through_reflection.table_name,
+            @reflection.through_reflection.quoted_table_name,
             @reflection.table_name, reflection_primary_key,
-            @reflection.through_reflection.table_name, source_primary_key,
+            @reflection.through_reflection.quoted_table_name, source_primary_key,
             polymorphic_join
           ]
         end
diff -Naur original/activerecord/lib/active_record/associations.rb new/activerecord/lib/active_record/associations.rb
--- original/activerecord/lib/active_record/associations.rb	2008-10-03 17:09:37.000000000 +0530
+++ new/activerecord/lib/active_record/associations.rb	2008-10-03 17:08:04.000000000 +0530
@@ -1935,7 +1935,7 @@
             protected
             
               def aliased_table_name_for(name, suffix = nil)
-                if !parent.table_joins.blank? && parent.table_joins.to_s.downcase =~ %r{join(\s+\w+)?\s+#{name.downcase}\son}
+                if !parent.table_joins.blank? && parent.table_joins.to_s.downcase =~ %r{join(\s+\w+)?\s+#{active_record.connection.quote_table_name(name.downcase)}\son}
                   @join_dependency.table_aliases[name] += 1
                 end