Problem with IE 7 and Digg widget

I was having a problem with the Digg widget (version 5.x-1.4) displaying when the text of the post was too long. After adding the following line to the theme_diggthis_button() function, it fixed the issue:

$teaser = strip_tags($node->teaser);
$teaser = substr($teaser, 0, 1300); // Added
$teaser = drupal_to_js($teaser);

Thanks!
Chris