I had addthis buttons working great for my blog in the past but I realized that sharing the url from my site with the tweet button generates a "undefined: [url]" tweet. Clicking the Twitter button on the share menu though doesn't produce this problem.
This is part of the code I used:
<div class="addthis_toolbox addthis_default_style ">
<a class="addthis_button_facebook_like" fb:like:layout="button_count"></a>
<a class="addthis_button_google_plusone" g:plusone:size="medium"></a>
<a class="addthis_counter addthis_pill_style"></a>
This question is closed to new answers.