Latest Apache Tomcat patches were applied to prevent known security vulnerabilities.
Holding down the Shift key to select multiple values from a multiple-value (custom list) quick filter did not select multiple values and resulted in the error: "An unexpected error occurred. If you continue to receive this error please contact your Tableau Server Administrator. Uncaught TypeError: Cannot read property 'id' of null".
When accessing a view while signed in with a user account with a guest license level, the page options displayed in an incorrect language.
When connected to a published extract, viewing the underlying data of a measure caused the error: "Internet communication error: Send failed since rewinding of the data stream failed()".
You could not select very small sections of a pie chart by clicking the labels.
Editing wgserver.vmopt before upgrading to Tableau Server 8.1 sometimes caused an internal error.