AddThis

Pinterest Button in Drupal 6 Module giving errors

I have installed and configured the AddThis module in my Drupal 6 website. It is currently displaying Google+, Facebook, LinkedIn, and Share buttons correctly. I have tried to add the Pinterest button but the image is not appearing. See page: http://www.printing.org/page/2876

From what I can tell it seems that the src URL for the Pinterest iframe is being URL encoded twice (see below). For example, regular URL encoding would make http:// = http%3A%2F%2F but when it is encoded twice those percent signs get encoded liek this: http%253A%252F%252F

I'm not sure if this is a problem with AddThis or the Drupal module or with my Drupal site in general.

Anyone have any ideas on how this could be fixed?

//s7.addthis.com/static/r07/pinit004.html?url=http%253A%252F%252Fwww.printing.org%252Fpage%252F2876%2523.T5A1a5Sjn38.pinterest&media=&description=&ats=title%3DAbout%2520Us%26url%3Dhttp%25253A%25252F%25252Fwww.printing.org%25252Fpage%25252F2876%252523.T5A1a5Sjn38.pinterest%26templates%3Dtwitter%253D%25257B%25257Btitle%25257D%25257D%252520%25257B%25257Burl%25257D%25257D%252520via%252520%252540PrintInd%26imp_url%3D0%26url_transforms%3Ddefrag%253D1%26passthrough%3Dlinkedin%253Dcounter%25253Dhorizontal&atc=ser...%252526%252526%252520H(d)%25252C%252520c%25255Bxa%25255D(this%25252C%252520arguments)%25253B%25250A%252520%252520%252520%252520%25257D%252520catch%252520(a)%252520%25257B%25250A%252520%252520%252520%252520%252520%252520%252520%252520throw%252520Ra(%252522exc%252522%25252C%252520b%25252C%252520a%252520%252526%252526%252520a%25255Bq%25255D)%25252C%252520a%25253B%25250A%252520%252520%252520%252520%25257D%25250A%25257D%26ui_use_css%3Dtrue%26data_use_cookies%3Dtrue%26ui_language%3Den-US%26data_use_flash%3Dtrue