This release is an important update to address the following product issue in Tableau Server 8.1. It does not affect Tableau Desktop.
Note: Tableau Online will not be upgrading to 8.1.1 until December 7, 2013. Please do not upgrade any workbooks you intend to publish to Tableau Online until that upgrade occurs.
After upgrading to Tableau Server 8.1, extracts refreshes and other background tasks would not complete. In the Status table on the Maintenance page, the Background Tasks process would have a permanent “Handling request” status and the Alerts menu would show that one or more extract refreshes had failed. This issue was caused by a system task that was used in earlier versions of Tableau Server but not in the current version. After upgrading to version 8.1, the Background Tasks process could not complete the system task and was unable to process any other tasks.