This is a maintenance release to fix minor issues. As we prepare our 4.2 release we will continue to provide small maintenance updates to 4.1.
An issue has been identified with PHP7.1 when using the Zend Opcache extension that may cause features on your site, such as member posting, not to work correctly. To resolve this issue, please disable the Zend Opcache PHP extension. The underlying issue is related to a third party library used by the Community Suite which has been updated in our upcoming 4.2 release, at which point the Opcache extension may be re-enabled.