After installing the AddThis plugin for Magento today using the Magento Connection Manager's direct file upload feature, we see this PHP error in the error log:
PHP Fatal error: Class 'AddThis_SharingTool_Helper_Data' not found in /path/to/magento/app/Mage.php on line 520, referer: http://domainname.com/index.php/admin/system_account/index/key/3faf5acd9b45e8e5dd2d9fdae73e0584/
Is 1.5.1 supported? Is there a known fix for this issue?
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