Hello - please can you confirm if there has been any tweaking your end to the vertical sharing bar? Its not just me but other twitter users are reporting problems with this as well:
Thanks for letting me know about this. We released updated vertical bar code that broke our labs implementation. While we're working on a fix it would probably be better if folks updated their code to the officially supported version which is available here: http://www.addthis.com/get/sharing
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