If you use AddThis module on drupal, you might have noticed that a 1px by 1px flash object is created which sets tracking cookies on your pages. This is transparent to the user most time and you will see it only under generated source view. The flash button is added dynamically by the addThis module on the top of the page. This sometimes can be annoying since a white bar can appear at the top of the page due to this.

In drupal 6, the flash tracking can be disabled. In drupal 5 the tracking can be disabled by adding the following line of code to addthis.module