Index: lib/technoweenie/attachment_fu/backends/db_file_backend.rb
===================================================================
--- lib/technoweenie/attachment_fu/backends/db_file_backend.rb	(revision 6256)
+++ lib/technoweenie/attachment_fu/backends/db_file_backend.rb	(revision 6257)
@@ -17,6 +17,11 @@
         def current_data
           db_file.data
         end
+
+        # Fix for keeping a db file
+        def temp_paths
+          @temp_paths ||= (new_record? || !current_data) ? [] : [create_temp_file]
+        end

         protected
           # Destroys the file.  Called in the after_destroy callback