I had add "#async=1" but I am not sure where should I put this part.
I am using wordpress 3.4.1 with addthis plugin 2.4.1,
which file and where should I put this?
function initAddThis()
{
addthis.init()
}
// After the DOM has loaded...
initAddThis();
You need to add that to JavaScript that runs after your page is loaded. The best place would probably be in the footer.php file, between <script></script> tags.
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