Several changes were applied to improve security. See ADV-2017-17, ADV-2017-19, ADV-2017-20 and ADV-2017-21 in Security Bulletins for more details.
In some cases, connecting to Marketo would not return your full data set.
Connections to Excel files saved in Excel version 1707 would fail with an error: Errors occurred while loading the data source
With recent updates to the Amazon Redshift driver, connections could fail with a no pg_hba.conf entry for host error. A workaround was to republish workbooks or data sources with Require SSL checked in the data connection.
SAML authentication from Tableau Desktop to Tableau Server would fail in some environments.
When you were connected to Snowflake and cast a string dimension to an integer or float, a Numeric value is not recognized error would occur.
Query execution errors would occur when you connected to Cloudera Impala using custom SQL with a date parameter.
Printing to PDF was noticeably slower in Tableau Desktop 10.0 and higher compared to prior versions.
In some European locales, double-precision numbers were returned as #ERROR or null.
When you connected to MySQL, case-sensitive table collation was ignored when custom SQL was used. Custom SQL connections to MySQL now default to database collation.