Fixing //bin.clearspring.com/at/v/1/button1.6.swf issues

As noted in #364078: Privacy concern: AddThis apparently putting flash tracking object on sites, AddThis has been adding a tracking flash object to the TOP of pages. As of early October, the added object looked like this:

<div>
  <object height="1" width="1" id="atff" data="//bin.clearspring.com/at/v/1/button1.6.swf" type="application/x-shockwave-flash">
    <param name="wmode" value="transparent"/>
    <param name="allowScriptAccess" value="always"/>
  </object>
</div>

The above code is not visible in Firefox by viewing source, but can only be seen via Firebug.

This annoyance presented itself as a 1px by 1px Flash object that showed up in the top left corner, but it broke my theme with a ~15 px margin that thus pushed the entire layout of the page down by a few pixels.

As noted in #364078: Privacy concern: AddThis apparently putting flash tracking object on sites, this is legitimate for AddThis to do, and furthermore if it's not desired then it can be turned off in Drupal 6 with a new feature implemented in the Drupal AddThis module v2.7.

However, that solution is only for Drupal 6. Legacy Drupal 5 users have no choice but to either (a) manually upgrade the module to reflect the changes in the Drupal 6 version of the module (to truly remove the flash object), or (b) use a CSS trick to hide the flash object (cosmetic theming only, doesn't prevent any invasion of privacy if that's what you're concerned about).

The CSS trick is simple:

#atff {
  display: none;
}

If anyone has any other Drupal 5.x solutions, please do post them here.